Hello everyone, this is our 13th lesson of the semester. Before today, we have already learned many skills, such as using gravity filtration to prepare clear limewater, using water displacement, gas generation apparatus to produce or collect carbon dioxide.

As usual, you are free to use all the materials you see in front of you to deal with the problem. The glassware such as 有側支的試管 or chemical drugs. What’s different today is that the source of quicklime comes from the drier in海苔cookie (it’s delicious) In today’s lesson, your first job is to prepare limewater and to create a CO₂ gas generator, we have mentioned before. Your final job is to give a data picture, to be more precise, you need to give a picture, plotting 濁度 against the amount of CO₂ to track the formation of CaCO₃ and the formation of Ca(HCO₃)₂. 

The only reminder is to be careful and avoid wasting as possible. Just feel free to ask me question and remember to communicate in English as possible as you can.

The calcium oxide also called quicklime because it is easily used to prepare carbon dioxide.

First of all.we use water to shake make these powder dissovlved.

Next,we combine flask, filter paper and funnel as a filtration devise to obtain filter limewater,which is the second family called clearly limewater.ok the third family is Calcium carbonate,called citric acid,when it react with calcium oxide,it produces carbon dioxide gas.

In our experiment,the produced CO2 is collected by the way of water displacement. CO2 gas can be detect by lime because it makes precipitation, which is made of cloudy.

The produced cloudy limewater is still basic because it makes Phenolphthalein turn red.

Followed by bubbling much more carbon dioxide into cloudy solution,its color gradually changed into clearly because of neutralization by carbonic acid.

The final solution is a clear solution because lime is soluble to water.

Here is our works to show how these four families change themselves into one another. Thank you very much!

Iodine is a kind of common reagent used to react with antioxidant

Starch is able to serve as indicator to detect the remaining iodine.

Starch is able to serve as indicator to detect the remaining iodine.

Because when starch encounter iodine solution, it turns blue.

Therefore, in advance we mix 10 ml of drink and starch to prepare sample solution.

When iodine solution drop in to the sample solution, the color fades until the antioxidant in the drink went out.

Therefore, in advance we mix 10 ml of drink and starch to prepare sample solution.

Iodine solution is a kind of common reagent used to react with antioxidant

Starch solution is able to sense as indicator to detect the remaining iodine

Because when starch solution encounter iodine solution ,it turns blue

Therefore, we mix up 10 mini liter of drinks and starch solution to prepare simple solution in advance

When we drop the iodine solution into the sample mixture , the color will fade away until the antioxidant went out.

The greater antioxidant capacity of drinks, the more iodine is consumed.

In this experience, we found the antioxidant capacity of_紅茶_ is greater than 檸檬紅茶_.

The calcium dioxide also called quicklime because it is easily used to prepare  limewater.

First of all, we use speaker to hold water to make these powder dissolved.

Next, we combine filtering paper, Funnel and flask as a filteration to obtain clear limewater, which is the second family called calcium hydroxide.

The third family is calcium carbonate, called limestone, when it reacts with lemon acid, it produces carbon dioxide gas.

In our experiment, the produced CO2 is collected by the way of water displacement .

CO2 gas can be detected by limewater because it makes precipitation, which is made of calcium dioxide.

The produced cloudy limewater is still basic because it makes indicator of pheothalien turn red .

Followed by bubbling much more CO2 into cloudy solution, color gradually changed into clear because of neutralization by carbonic acid.

The final solution is a clear solution because calcium Hydrogen carbonate

is soluble to water.

Here is our works to show how these four families changed themselves into one another, thank you very much.

Iodine is a kind of common reagent used to react with antioxidant

Starch is able to serve as indicator to detect the remaining iodine.

Starch is able to serve as indicator to detect the remaining iodine.

Because when starch encounter iodine solution, it turns blue.

Therefore, in advance we mix 10 ml of drink and starch to prepare sample solution.

When iodine solution drop in to the sample solution, the color fades until the antioxidant in the drink went out.

Therefore, in advance we mix 10 ml of drink and starch to prepare sample solution.

Iodine is a kind of common reagent used to react with antioxidant.

Starch is able to serve as indicator to detect the remaining iodine.

Starch is able to serve as indicator to detect the remaining iodine.

Because when starch encounter iodine solution, it turns blue.

Therefore, in advance we mix 10 ml of drink and starch to prepare sample solution.

When iodine solution drop in to the sample solution, the color fades until the antioxidant in the drink went out.

Iodine is a kind of common reagent used to react with antioxidant.

Starch is able to serve as indicator to detect the remaining iodine.

Because when starch encounter iodine solution, it turns blue. Therefore, in advance we mix 10 ml of drink and starch to prepare sample solution.

When iodine solution drop in to the sample solution, the color fades until the antioxidant in the drink went out.

2.Iodine solution is a common reagent used to react with antioxidants.

3.Starch solution can serve as an indicator to detect the remaining iodine.

4.Because when starch solution encounters iodine solution, it turns blue.

5.Therefore, in advance, we will mix 10 mL of the drink with starch solution to prepare the sample solution.

6.When iodine solution is added drop by drop into the sample mixture, the color will continue to fade until the antioxidants in the drink are depleted.

7.The greater the antioxidant capacity of the drink, the more iodine is consumed.

8.In this experiment, we found that the antioxidant capacity of Drink A/Drink B is greater.

2.Iodine solution is a common reagent used to react with antioxidants.

3.Starch solution can serve as an indicator to detect the remaining iodine.

4.Because when starch solution encounters iodine solution, it turns blue.

5.Therefore, in advance, we will mix 10 mL of the drink with starch solution to prepare the sample solution.

6.When iodine solution is added drop by drop into the sample mixture, the color will continue to fade until the antioxidants in the drink are depleted.

7.The greater the antioxidant capacity of the drink, the more iodine is consumed.

8.In this experiment, we found that the antioxidant capacity of Drink A/Drink B is greater.

Iodine is a kind of common reagent used to react with antioxidant .

Starch is able to serve as indicator to detect the remaining iodine.

Starch is able to serve as indicator to detect the remaining iodine.

Because when starch encounter iodine solution, it turns blue.

Therefore, in advance we mix 10 ml of drink and starch to prepare sample solution.

When iodine solution drop in to the sample solution, the color fades until the antioxidant in the drink went out.

The calcium oxide also called quicklime because it is easily used to prepare CO2

(Here is how to prepare limewater)

First of all,we use beaker to hold water and quicklime was added into water to make those powder dissolved.

Next we combine funnel and filter paper,and then we connect funnel and flask as a filtration device  to obtain clear limewater , which is the second family called calcium hydroxide .

Ok the third family is calcium carbonate , called limestone, when it reacts with citric acid ,it produces CO2  gas .

In our experiment ,the produced CO2 is collected by the way of water displacement.

CO2 gas can be detected by limewater because it makes precipitation , which is made of calcium carbonate .

The produced cloudy limewater is still basic because it makes phenolphthalein become red

Followed by bubbling much more CO2 into cloudy solution,its color gradually changed into clarify because of neutralization by carbonic acid.

The final solution is a clear solution because calcium hydrogen carbonate is soluble to water.

Here is our works to show how these four families change themselves into one another,thank you very much!!https://youtu.be/xmZjT2UlN_Q?feature=shared

https://youtu.be/jZVDqMuu0k4?feature=shared

講稿

Today We are determining the antioxidant ability of two different type of drinks by iodine titration.

lodine is a kind of common

reagent used to react with

antioxidant.

Starch is able to serve as

indicator to detect the remaining iodine.

Because when starch encounter iodine

solution, it turns blue.

Therefore, in advance we mix 10 ml of drink and starch to prepare sample solution.

When iodine solution drop in to the sample solution, the color fades until the antioxidant in the drink went out.

Hello everyone now we are going to introduce the family of lime .

The calcium dioxide also called quicklime because it is easily used to prepare limewater.

First of all, we use speaker to hold water to make these powder dissolved.

Next, we combine filtering paper, Funnel and flask as a filteration to obtain clear limewater, which is the second family called calcium hydroxide.

The third family is calcium carbonate, called limestone, when it reacts with lemon acid, it produces carbon dioxide gas.

In our experiment, the produced CO2 is collected by the way of water displacement .

CO2 gas can be detected by limewater because it makes precipitation, which is made of calcium dioxide.

The produced cloudy limewater is still basic because it makes indicator of pheothalien turn red .

Followed by bubbling much more CO2 into cloudy solution, color gradually changed into clear because of neutralization by carbonic acid.

The final solution is a clear solution because calcium Hydrogen carbonate

is soluble to water.

Here is our works to show how these four families changed themselves into one another, thank you very much

The calcium oxide also called quicklime because it is easily used to prepare CO2

(Here is how to prepare limewater)

First of all,we use beaker to hold water and quicklime was added into water to make those powder dissolved.

Next we combine funnel and filter paper,and then we connect funnel and flask as a filtration device to obtain clear limewater , which is the second family called called calcium hydroxide .

Ok the third family is calcium carbonate , called limestone, when it reacts with citric acid ,it produces CO2 gas .

In our experiment ,the produced CO2 is collected by the way of water displacement.

CO2 gas can be detected by limewater because it makes precipitation , which is made of calcium carbonate .

The produced cloudy limewater is still basic because it makes phenolphthalein become red

Followed by bubbling much more CO2 into cloudy solution,its color gradually changed into clarify because of neutralization by carbonic acid.

The final solution is a clear solution because calcium hydrogen carbonate is soluble to water.

Here is our works to show how these four families change themselves into one another,thank you very much!!

Iodine is a kind of common reagent used to react with antioxidant.

Starch is able to serve as indicator to detect the remaining iodine.

Starch is able to serve as indicator to detect the remaining iodine.

Because when starcTherefore, in advance we mix 10 ml of drink and starch to prepare sample solution.

When iodine solution drop in to the sample solution, the color fades until the antioxidant in the drink went out.h encounter iodine solution, it turns blue.

Hello everyone now we are going to introduce the family of lime .

The calcium dioxide also called quicklime because it is easily used to prepare  limewater.

First of all, we use speaker to hold water to make these powder dissolved.

Next, we combine filtering paper, Funnel and flask as a filteration to obtain clear limewater, which is the second family called calcium hydroxide.

The third family is calcium carbonate, called limestone, when it reacts with lemon acid, it produces carbon dioxide gas.

In our experiment, the produced CO2 is collected by the way of water displacement .

CO2 gas can be detected by limewater because it makes precipitation, which is made of calcium dioxide.

The produced cloudy limewater is still basic because it makes indicator of phenolphthalein turn red .

Followed by bubbling much more CO2 into cloudy solution, color gradually changed into clear because of neutralization by carbonic acid.

The final solution is a clear solution because calcium Hydrogen carbonate

is soluble to water.

Here is our works to show how these four families changed themselves into one another, thank you very much

Iodine is a kind of common reagent used to react with antioxidant.

Starch is able to serve as indicator to detect the remaining iodine.

Starch is able to serve as indicator to detect the remaining iodine.

Because when starch encounter iodine solution, it turns blue.

Therefore, in advance we mix 10 ml of drink and starch to prepare sample solution.

When iodine solution drop in to the sample solution, the color fades until the antioxidant in the drink went out.

https://youtu.be/cxqjCj5SWVY?feature=shared

Okay guys hello everyone now we are going to introduce the family of L. This is a the also called quick L because it is easy us to prepare lime water. First of all we use speaker to hold water to make this this powder. So next we come combine fernal filter paper and pl as a filtration device to get to obtain clean lime water which is the second family called Hydro.Hydra family is called caret also called lime St and it react with crazy a it produce carbon dioxide gas in our experiment we use pipe to transport the collected gas into the clean water can by water pration which is made of cium carbonate the produced cloudy lime water is still basic because it makes your turn red Follow by bubbling cloudy solution it gradually change into white because of neutralization of Carbonic it turn R oh very good okay the final solution

ising soluable to water this is our word

to show how family can into one thank you

Iodine is a kind of common reagent used to react with antioxidant

Starch is able to serve as indicator to detect the remaining iodine.

Starch is able to serve as indicator to detect the remaining iodine.

Because when starch encounter iodine solution, it turns blue.

Therefore, in advance we mix 10 ml of drink and starch to prepare sample solution.

When iodine solution drop in to the sample solution, the color fades until the antioxidant in the drink went out.

Iodine is a kind of common reagent used to react with antioxidant

Starch is able to serve as indicator to detect the remaining iodine.

Because when starch encounter iodine solution, it turns blue.

Therefore, in advance we mix 10 ml of drink and starch to prepare sample solution.

When iodine solution drop in to the sample solution, the color fades until the antioxidant in the drink went out.

The calcium dioxide also called quicklime because it is easily used to prepare limewater.

First of all, we use speaker to hold water to make these powder dissolved.

Next, we combine filtering paper, Funnel and flask as a filteration to obtain clear limewater, which is the second family called calcium hydroxide.

The third family is calcium carbonate, called limestone, when it reacts with lemon acid, it produces carbon dioxide gas.

In our experiment, the produced CO2 is collected by the way of water displacement .

CO2 gas can be detected by limewater because it makes precipitation, which is made of calcium dioxide.

The produced cloudy limewater is still basic because it makes indicator of pheothalien turn red .

Followed by bubbling much more CO2 into cloudy solution, color gradually changed into clear because of neutralization by carbonic acid.

The final solution is a clear solution because calcium Hydrogen carbonate

is soluble to water.

Here is our works to show how these four families changed themselves into one another, thank you very much

The calcium oxide also called quicklime because it is easily used to prepare CO2 

(Here is how to prepare limewater)

First of all,we use beaker to hold water and quicklime was added into water to make those powder dissolved. 

Next we combine funnel and filter paper,and then we connect funnel and flask as a filtration device to obtain clear limewater , which is the second family called called calcium hydroxide .

Ok the third family is calcium carbonate , called limestone, when it reacts with citric acid ,it produces CO2 gas .

In our experiment ,the produced CO2 is collected by the way of water displacement. 

CO2 gas can be detected by limewater because it makes precipitation , which is made of calcium carbonate .

The produced cloudy limewater is still basic because it makes phenolphthalein become red

Followed by bubbling much more CO2 into cloudy solution,its color gradually changed into clarify because of neutralization by carbonic acid.

The final solution is a clear solution because calcium hydrogen carbonate is soluble to water.

Here is our works to show how these four families change themselves into one another,thank you very much!!

The calcium dioxide also called quicklime because it is easily used to prepare limewater.

First of all, we use speaker to hold water to make these powder dissolved.

Next, we combine filtering paper, Funnel and flask as a filteration to obtain clear limewater, which is the second family called calcium hydroxide.

The third family is calcium carbonate, called limestone, when it reacts with lemon acid, it produces carbon dioxide gas.

In our experiment, the produced CO2 is collected by the way of water displacement .

CO2 gas can be detected by limewater because it makes precipitation, which is made of calcium dioxide.

The produced cloudy limewater is still basic because it makes indicator of pheothalien turn red .

Followed by bubbling much more CO2 into cloudy solution, color gradually changed into clear because of neutralization by carbonic acid.

The final solution is a clear solution because calcium Hydrogen carbonate

is soluble to water.

Here is our works to show how these four families changed themselves into one another, thank you very much

Hello everyone, now we are going to introduce the family of lime

The calcium oxide also called quicklime because it is easily used to prepare CO2

(Here is how to prepare limewater)

First of all, we use beaker to hold water and quicklime was added into water to

make those powder dissolved.

Next we combine funnel and filter

paper,and then we connect funnel and flask as a filtration device to obtain clear limewater, which is the second family called called calcium hydroxide.

Ok the third family is calcium carbonate, called limestone, when it reacts with citric acid ,it produces CO2 gas.

In our experiment ,the produced CO2 is

collected by the way of water displacement.

CO2 gas can be

detected by limewater because it makes precipitation, which is made of calcium carbonate.

The produced cloudy limewater is still basic because it makes phenolphthalein become red

Followed by bubbling much more CO2 into cloudy solution, its color gradually changed into clarify because of neutralization by carbonic acid.

The final solution is a clear solution because calcium hydrogen carbonate is soluble to water.

Here is our works to show how these four families change themselves into one another, thank you very much!!

拿起兩個飲料

lodine is a kind of common reagent used to react with antioxidant

拿起碘液滴到水里面

Starch is able to serve as indicator to detect the remaining iodine.

Starch is able to serve as indicator to detect the remaining iodine.

Because when starch encounter iodine solution, it turns blue.

Therefore, in advance we mix 10 ml of drink and starch to prepare sample solution.

When iodine solution drop in to the sample solution, the color fades until the antioxidant in the drink went out.

Iodine is a kind of common drop used to react with antioxidant capacity

starch liquid is able to serve as indicator to detect the remaining of iodine

when starch liquid encounter iodine ,it turns blue

Therefore, we will mix 10ml of drinks and starch liquid to prepare sample solution

when iodine drop into the sample solution,the color will continue to fade until the antioxidant in the drink be consumed

The more amount of iodine was consumed , the greater antioxidant capacity of drink

In this experiment, we found that the antioxidant capacity of this drink is better

Iodine is a kind of common reagent used to react with antioxidant

Starch is able to serve as indicator to detect the remaining iodine.

Starch is able to serve as indicator to detect the remaining iodine.

Because when starch encounter iodine solution, it turns blue.

Therefore, in advance we mix 10 ml of drink and starch to prepare sample solution.

When iodine solution drop in to the sample solution, the color fades until the antioxidant in the drink went out.

Therefore, in advance we mix 10 ml of drink and starch to prepare sample solution.

Iodine is a kind of common drop used to react with antioxidant capacity

starch liquid is able to serve as indicator to detect the remaining of iodine

when starch liquid encounter iodine ,it turns blue

Therefore, we will mix 10ml of drinks and starch liquid to prepare sample solution

when iodine drop into the sample solution,the color will continue to fade until the antioxidant in the drink be consumed

The more amount of iodine was consumed , the greater antioxidant capacity of drink

In this experiment, we found that the antioxidant capacity of this drink is better

Iodine is a kind of common reagent used to react with antioxidant.

Starch is able to serve as indicator to detect the remaining iodine.

Because when starch encounter iodine solution, it turns blue.

Therefore, in advance we mix 10 ml of drink and starch to prepare sample solution.

When iodine solution drop in to the sample solution, the color fades until the antioxidant in the drink went out.

The calcium dioxide also called quicklime because it is easily used to prepare limewater.

First of all, we use speaker to hold water to make these powder dissolved.

Next, we combine filtering paper, Funnel and flask as a filteration to obtain clear limewater, which is the second family called calcium hydroxide.

The third family is calcium carbonate, called limestone, when it reacts with lemon acid, it produces carbon dioxide gas.

In our experiment, the produced CO2 is collected by the way of water displacement .

CO2 gas can be detected by limewater because it makes precipitation, which is made of calcium dioxide.

The produced cloudy limewater is still basic because it makes indicator of pheothalien turn red .

Followed by bubbling much more CO2 into cloudy solution, color gradually changed into clear because of neutralization by carbonic acid.

The final solution is a clear solution because calcium Hydrogen carbonate

is soluble to water.

Here is our works to show how these four families changed themselves into one another, thank you very much

Iodine is a kind of common reagent used to react with antioxidant

Starch is able to serve as indicator to detect the remaining iodine.

Starch is able to serve as indicator to detect the remaining iodine.

Because when starch encounter iodine solution, it turns blue.

Therefore, in advance we mix 10 ml of drink and starch to prepare sample solution.

When iodine solution drop in to the sample solution, the color fades until the antioxidant in the drink went out.

The calcium dioxide also called quicklime because it is easily used to prepare limewater.

First of all, we use speaker to hold water to make these powder dissolved.

Next, we combine filtering paper, Funnel and flask as a filteration to obtain clear limewater, which is the second family called calcium hydroxide.

The third family is calcium carbonate, called limestone, when it reacts with lemon acid, it produces carbon dioxide gas.

In our experiment, the produced CO2 is collected by the way of water displacement .

CO2 gas can be detected by limewater because it makes precipitation, which is made of calcium dioxide.

The produced cloudy limewater is still basic because it makes indicator of pheothalien turn red .

Followed by bubbling much more CO2 into cloudy solution, color gradually changed into clear because of neutralization by carbonic acid.

The final solution is a clear solution because calcium Hydrogen carbonate

is soluble to water.

Here is our works to show how these four families changed themselves into one another, thank you very much

The calcium dioxide also called quicklime because it is easily used to prepare  limewater.

First of all, we use speaker to hold water to make these powder dissolved.

Next, we combine filtering paper, Funnel and flask as a filteration to obtain clear limewater, which is the second family called calcium hydroxide.

The third family is calcium carbonate, called limestone, when it reacts with lemon acid, it produces carbon dioxide gas.

In our experiment, the produced CO2 is collected by the way of water displacement .

CO2 gas can be detected by limewater because it makes precipitation, which is made of calcium dioxide.

The produced cloudy limewater is still basic because it makes indicator of pheothalien turn red .

Followed by bubbling much more CO2 into cloudy solution, color gradually changed into clear because of neutralization by carbonic acid.

The final solution is a clear solution because calcium Hydrogen carbonate

is soluble to water.

Here is our works to show how these four families changed themselves into one another, thank you very much.

The calcium dioxide also called quicklime because it is easily used to prepare  limewater.

First of all, we use speaker to hold water to make these powder dissolved.

Next, we combine flask,funnel and filtering paper as a filteration to obtain clear limewater, which is the second family called calcium hydroxide.

The third family is calcium carbonate, called limestone, when it reacts with lemon acid, it produces carbon dioxide gas.

In our experiment, the produced CO2 is collected by the way of water displacement .

CO2 gas can be detected by limewater because it makes precipitation, which is made of calcium dioxide.

The produced cloudy limewater is still basic because it makes indicator of pheothalien turn red .

Followed by bubbling much more CO2 into cloudy solution, color gradually changed into clear because of neutralization by carbonic acid.

The final solution is a clear solution because calcium Hydrogen carbonate

is soluble to water.

Here is our works to show how these four families changed themselves into one another, thank you very much!

Iodine is a kind of common drop used to react with antioxidant capacity

starch liquid is able to serve as indicator to detect the remaining of iodine

when starch liquid encounter iodine ,it turns blue

Therefore, we will mix 10ml of drinks and starch liquid to prepare sample solution

when iodine drop into the sample solution,the color will continue to fade until the antioxidant in the drink be consumed

The more amount of iodine was consumed , the greater antioxidant capacity of drink

In this experiment, we found that the antioxidant capacity of this drink is better

Iodine is a kind of common reagent used to react with antioxidant

Starch is able to serve as indicator to detect the remaining iodine.

Starch is able to serve as indicator to detect the remaining iodine.

Because when starch encounter iodine solution, it turns blue.

Therefore, in advance we mix 10 ml of drink and starch to prepare sample solution.

When iodine solution drop in to the sample solution, the color fades until the antioxidant in the drink went out

.https://youtu.be/KTJK6P4qB-E

Lodine is a kind of common reagent used to react with antioxidant.

Starch solution is able to serve as indicator to detect the remaining iodine.

Because when starch encounter iodine solution, it turns blue.

Therefore, in advance we mix 10 ml of drink and starch solution to prepare sample solution.

When iodine solution drop in to the sample solution, the color fades until the antioxidant in the drink went out.

Iodine is a kind of common reagent used to react with antioxidant

Starch is able to serve as indicator to detect the remaining iodine.

Starch is able to serve as indicator to detect the remaining iodine.

Because when starch encounter iodine solution, it turns blue.

Therefore, in advance we mix 10 ml of drink and starch to prepare sample solution.When iodine solution drop in to the sample solution, the color fades until the antioxidant in the drink went out.

The calcium oxide also called lime because it is easily used to prepare limewater

First of all, we use beaker to hold water to make this powder dissolved.

Next we combine flask funnel and filtering paper as a filtration device to obtain clear limewater, which is the second family called calcium hydroxide.

OK, the third family is calcium carbonate ,called limestone , when it react with citric acid,it produces carbon dioxide gas

In our experiment , the produced CO2 is collected by the way of water displacement.

CO2 gas can be detected by limewater because it makes precipitation, is made of calcium carbonate .

The produce cloudy limewater is still basic because it makes indicator of phenolphthalein turn pink

Followed by bubbling much more carbon dioxide into cloudy solution ,lt is gradually changed into crystal because of neutralization by carbonic acid.

The final solution is a clear solution because calcium hydroxide is soluble to water

Iodine is a kind of common reagent used to react with antioxidant

Starch is able to serve as indicator to detect the remaining iodine.

Starch is able to serve as indicator to detect the remaining iodine.

Because when starch encounter iodine solution, it turns blue.

Therefore, in advance we mix 10 ml of drink and starch to prepare sample solution.When iodine solution drop in to the sample solution, the color fades until the antioxidant in the drink went out.

The calcium oxide also called lime because it is easily used to prepare limewater

First of all, we use beaker to hold water to make this powder dissolved.

Next we combine flask funnel and filtering paper as a filtration device to obtain clear limewater, which is the second family called calcium hydroxide.

OK, the third family is calcium carbonate ,called limestone , when it react with citric acid,it produces carbon dioxide gas

In our experiment , the produced CO2 is collected by the way of water displacement.

CO2 gas can be detected by limewater because it makes precipitation, is made of calcium carbonate .

The produce cloudy limewater is still basic because it makes indicator of phenolphthalein turn pink

Followed by bubbling much more carbon dioxide into cloudy solution ,lt is gradually changed into crystal because of neutralization by carbonic acid.

The final solution is a clear solution because calcium hydroxide is soluble to water.

everyone now we are

going to introduce the

family of L. This is a

the also called quick L

because it is easy us

to prepare lime water.

First of all we use

speaker to hold water

to make this this

powder. So next we

come combine fernal

filter paper and pl as

a filtration device to

get to obtain clean

lime water which is

the second family

called Hydro.Hydra

family is called caret

also called lime St

and it react with

crazy a it produce

carbon dioxide gas in

our experiment we

use pipe to transport the collected gas into

the clean water can

by water pration

which is made of

cium carbonate the

produced cloudy lime

water is still basic

because it makes

your turn red Follow

by bubbling cloudy

solution it gradually

change into white

because of

neutralization of

Carbonic it turn R oh

very good okay the

final solution

ising soluable to

water this is our word

to show how family

can into one thank you

determining the

antioxidant ability of

two different type of

drinks by iodine

titration.

Iodine is a kind of

common reagent

used to react with

antioxidant

Starch is able to

serve as indicator to

detect the remaining

iodine.

Starch is able to

serve as indicator to

detect the remaining

iodine.

Because when starch

encounter iodine

solution, it turns blue.

Therefore, in advance

we mix 10 ml of drink

and starch to prepare

sample solution

When iodine solution

drop in to the sample

solution, the color

fades until the antioxidant in the

drink went out.

2. Iodine solution is a common reagent that reacts with antioxidants. (Action: Take the iodine solution and add it drop by drop to the beaker with water)

3. Starch solution can serve as an indicator to detect the remaining iodine. (Action: Use a dropper to add the starch solution into the beaker containing iodine solution)

4. Because when starch solution encounters iodine solution, it turns blue. (Action: Point at the color change to blue and smile)

5. Therefore, in advance, we will mix 10 mL of the drink with the starch solution to prepare a sample solution. (Action: Measure 10 mL of the drink into a conical flask and add the starch solution)

6. Add the iodine solution to the sample mixture, and the color will gradually change until it remains blue, indicating the drink’s antioxidant content. (Action: Carefully add the iodine solution drop by drop into the sample mixture and stir continuously to maintain the color change)

7. The greater the antioxidant capacity of the drink, the more iodine is needed for the color to stay blue. (Action: Observe the color change and record the amount of iodine solution added)

8. In this experiment, we found that the antioxidant capacity of drink A or drink B is greater. (Action: Hold up one of the drinks and compare)

Let me know if you’d like any further assistance.

The calcium oxide also called quicklime because it is easily used to prepare CO2 

(Here is how to prepare limewater)

First of all,we use beaker to hold water and quicklime was added into water to make those powder dissolved. 

Next we combine funnel and filter paper,and then we connect funnel and flask as a filtration device to obtain clear limewater , which is the second family called called calcium hydroxide .

Ok the third family is calcium carbonate , called limestone, when it reacts with citric acid ,it produces CO2 gas .

In our experiment ,the produced CO2 is collected by the way of water displacement. 

CO2 gas can be detected by limewater because it makes precipitation , which is made of calcium carbonate .

The produced cloudy limewater is still basic because it makes phenolphthalein become red

Followed by bubbling much more CO2 into cloudy solution,its color gradually changed into clarify because of neutralization by carbonic acid.

The final solution is a clear solution because calcium hydrogen carbonate is soluble to water.

Here is our works to show how these four families change themselves into one another,thank you very much!!

Iodine is a kind of common drop used to react with antioxidant capacity

starch liquid is able to serve as indicator to detect the remaining of iodine

when starch liquid encounter iodine ,it turns blue

Therefore, we will mix 10ml of drinks and starch liquid to prepare sample solution

when iodine drop into the sample solution,the color will continue to fade until the antioxidant in the drink be consumed

The more amount of iodine was consumed , the greater antioxidant capacity of drink

In this experiment, we found that the antioxidant capacity of this drink is better

The calcium dioxide also called quicklime because it is easily used to prepare  limewater.

First of all, we use speaker to hold water to make these powder dissolved.

Next, we combine filtering paper, Funnel and flask as a filteration to obtain clear limewater, which is the second family called calcium hydroxide.

The third family is calcium carbonate, called limestone, when it reacts with lemon acid, it produces carbon dioxide gas.

In our experiment, the produced CO2 is collected by the way of water displacement .

CO2 gas can be detected by limewater because it makes precipitation, which is made of calcium dioxide.

The produced cloudy limewater is still basic because it makes indicator of pheothalien turn red .

Followed by bubbling much more CO2 into cloudy solution, color gradually changed into clear because of neutralization by carbonic acid.

The final solution is a clear solution because calcium Hydrogen carbonate

is soluble to water.

Here is our works to show how these four families changed themselves into one another, thank you very much.

The calcium oxide also called quicklime because it is easily used to prepare CO2.

(Here is how to prepare limewater)

First of all, we use beaker to hold water and quicklime was added into water to make those powder dissolved.

Next, we combine funnel and filter paper, and then we connect funnel and flask as a filtration device to obtain clear limewater, which is the second family called calcium hydroxide.

Ok, the third family is calcium carbonate, called limestone, when it reacts with citric acid, it produces CO2 gas.

In our experiment, the produced CO2 is collected by the way of water displacement.

CO2 gas can be detected by limewater because it makes precipitation, which is made of calcium carbonate.

The produced cloudy limewater is still basic because it makes phenolphthalein become red.

Followed by bubbling much more CO2 into cloudy solution, its color gradually changed into clarify because of neutralization by carbonic acid.

The final solution is a clear solution because calcium hydrogen carbonate is soluble to water.

Here is our works to show how these four families change themselves into one another, thank you very much.

The calcium dioxide also called quicklime because it is easily used to prepare limewater.

First of all, we use speaker to hold water to make these powder dissolved.

Next, we combine flask,funnel and filtering paper as a filteration to obtain clear limewater, which is the second family called calcium hydroxide.

The third family is calcium carbonate, called limestone, when it reacts with lemon acid, it produces carbon dioxide gas.

In our experiment, the produced CO2 is collected by the way of water displacement .

CO2 gas can be detected by limewater because it makes precipitation, which is made of calcium dioxide.

The produced cloudy limewater is still basic because it makes indicator of pheothalien turn red .

Followed by bubbling much more CO2 into cloudy solution, color gradually changed into clear because of neutralization by carbonic acid.

The final solution is a clear solution because calcium Hydrogen carbonate

is soluble to water.

Here is our works to show how these four families changed themselves into one another, thank you very much!

The calcium dioxide also called quicklime because it is easily used to prepare limewater.

First of all, we use speaker to hold water to make these powder dissolved.

Next, we combine flask,funnel and filtering paper as a filteration to obtain clear limewater, which is the second family called calcium hydroxide.

The third family is calcium carbonate, called limestone, when it reacts with lemon acid, it produces carbon dioxide gas.

In our experiment, the produced CO2 is collected by the way of water displacement .

CO2 gas can be detected by limewater because it makes precipitation, which is made of calcium dioxide.

The produced cloudy limewater is still basic because it makes indicator of pheothalien turn red .

Followed by bubbling much more CO2 into cloudy solution, color gradually changed into clear because of neutralization by carbonic acid.

The final solution is a clear solution because calcium Hydrogen carbonateis soluble to water.

Here is our works to show how these four families changed themselves into one another, thank you very much!