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1 )Sodium bicarbonate  and water.
2 ) A mixture of dyes that changes colour gradually over a range of pH and is used in testing for acids.
3 )

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2.  A MIXTURE OF DYES THAT CHANGES COLOUR GRADUALLY OVER A RANGE OF pH AND IS USED IN TESTING FOR ACIDS

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1. SODIUM BICARBONATE
AND WATER

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1.  CONSTITUENTS OF BAKING POWDER ARE :
SODIUM, HYDROGEN AND CARBONATE (  NaHCO3 )

2. AN UNIVERSAL INDICATOR HELPS US TO INDENTIFY WEATHER THE SUBSTANCE IS A BASE OR ACID. EX : LITMUS PAPER

3. COMMON SALT :
SODIUM + CHLORINE = NaCl ( COMMON SALT )

4. THE BAKING SODA REACTS WITH THE OTHER INGRIDIANTS  IN THE CAKE BATTER AND HENCE THE CAKE BECOMES FLUFFY.

5. IF THE PH LEVEL OF OUR TEETH GOES LESS THEN 5.5 THE THEY START DECAYING.

6. USES OF BAKING SODA :
IT IS USED IN SOAPS , MEDECINS , CAKES , BREADS ETC.

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1] tartaric acid and starch
2]

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ANS 6 : IT  MAKES THE MOUTH MORE FRESH.
IT POLISHES OUR TEETH AND RELIEVES AC

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ANS 5 : 5

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Questions 7:
When excess base is dissolved in the solution of sodium hydroxide then the concentration ofhydroxide (OH⁻) ions increases.

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1) baking soda is a composition of baking soda , tartaric acid and starch
2)universal indicator is a PH indicator which is composed solution of several compounds

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ANS 4: BAKING SODA IS USED TO MAKE THE CAKE MORE FLUFFIER AND

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3 sodium chloride is a salt
the formula is NaCl

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1)Baking Soda is made of tartaric acid and starch.
2)A mixture of dyes that changes color gradually used for testing acids and bases
3)Baking soda
Washing soda
NaOH
4) lol

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ANS 3: CALCIUM CARBONATE AND

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Question 10:
CaOCl2 + CO2 = CaCO3 + Cl2
Question 4:

A delicious fluffy cake just doesn’t happen by chance. It takes a harmless chemical reaction to make a cake fluffy and light.

Baking powder is mixed with an acid to produce carbon dioxide.

This gas is harmless when eaten. As it becomes hot in the oven the gas expands and makes bubbles in the cake mixture. This makes the cake rise.
Question

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1. BAKING POWDER IS A MIXTURE COMPOSED OF BAKING SODA,TARTARIC ACID AND STARCH.IT IS USEDIN MAKING BREAD,CAKES AND BAKED FOOD ITEMS.
2.UNIVERSAL INDICATOR IS A MIXTURE OF INDICATORS WHICH SHOWS DIFFERENT COLOUR CHANGES FOR SOLUTION WITH DIFFERENT PH VALUES.IT IS USED TO TEST WHEATHER A SOLUTION IS ACID OR BASE.

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ans4. Baking powder is mixed with an acid to produce carbon dioxide.This gas is harmless when eaten. As it becomes hot in the oven the gas expands and makes bubbles in the cake mixture. This makes the cake rise.When a carbonate (Bi-Carb Soda) is mixed with an acid (vinegar) carbon dioxide gas is produced.
Reaction mechanism
NaHCO ₃ + H⁺ → Na⁺ + H ₂ O + CO 2

ANS1. Most commercially available baking powders are made up of sodium bicarbonate(also known as baking soda or bicarbonate of soda) and one or more acid salts. Typical formulations (by weight) call for 30% sodium bicarbonate, 5-12%monocalcium phosphate, and 21-26% sodium aluminum sulfate.

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1. Baking soda ( Sodium bicarbonate) and tartaric acid
2. A mixture of dyes that change their colour gradually over a range of PH and is used in testing acids and alkalis.
3. Calcium Carbonate and Calcium Silicate.
4.

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1)Sodium bicarbonate
2)indicators are substances that turn blues in contact with bases and red with acids.
3)common salt =NaCL
Hence,sodium and chlorine
12)

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1] baking powder is a mixture of baking soda, tartaric acid and starch.
2] the universal indicator is the PH indicator.
4] the cake becomes fluffy after baking after adding baking soda because baking soda has carbon dioxide which enables it to rise and become fluffy.
3]

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1.sodium bicarbonate
2.litmus paper
3. zinc + hydroxide
5.phosphourus
6.It is used in the baking of cake , pancake etc .
12.

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2:litmus paper
3.The chemicals made of common salt are Calcium carbonate and Calcium Silicate.
4. If baking soda is mixed with the other ingredients that are  used to bake a cake, it causes the mixture to expand. Therefore making it light and fluffy.
5. The pH value after which the tooth starts decaying is 5.5.
6. Baking Soda is used to:-
i) To freshen our mouth.
ii) To polish our teeth.
iii) To relieve itching.
9. Properties of Bleaching powder:
i) Soluble in water (alkali).
ii) Yellowish-white in color.
iii) Strong smell of chlorine.
Uses of Bleaching powder:
i) Water treatment.
ii) Maintain white clothes.
iii) To clear away the molds.
11. When quick lime is added to water, they react to form slaked lime. And release heat.
12. Properties of acids:
i) Acids are sour.
ii) Acids turn blue litmus red.
iii) Acids contain H+ ions.
iv) Acids pH value is from 0-7.
v) They are liquids.
vi) Turn universal indicator from green to red

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ANS 2 ; A MIXTURE OF DYES THAT CHANGES COLOUR GRADUALLY OVER A RANGE OF pH AND USED IN ACIDS AND ALKALIS

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1] baking soda consists of sodium bicarbonate
2] universal indicator shows wether a substance is acidic or basic, eg- litmus
3]  common salt- NaCl- sodium chloride.
4]  the reaction of baking soda and other ingredients of the cake causes the cake to become fluffy
5] the pH the value after which teeth start to decay is 5
6] baking soda is often used as a bleach, it is also used  to supress acid in insect bites and as a major ingredient of baking
7]

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Answer 1 = The last two ingredients are acidic: they combine with the sodium bicarbonate and water to produce the gaseous carbon dioxide.

Answer 2 = a mixture of dyes that changes color gradually over a range of pH and is used (especially as indicator paper) in testing for acids.

Answer 3 = Salt is used to bleach wood pulp. It also is used to make sodium chlorate,

Answer 4=  Baking soda causes the cake mixture to expand, allowing air in. It is this air which causes the cake to become light and fluffy.

Answer 5=  Saliva can help neutralize the acid, but the pH of saliva can become more acidic after eating acidic foods. ... In that time, the lower pH of the mouth creates an optimal environment for bad bacteria, which eventually causes tooth decay.

Answer 6=

Freshen your breath. Mix 1 tsp of baking soda in a glass of water.

Polish your teeth. Many people will use baking soda as a natural toothpaste.

3. Make your own deodorant.

Gently exfoliate.

Relieve Skin Irritation.

Relieve heartburn.

Relieve insect bites.

Answer 7= When excess base is dissolved in the solution of sodium hydroxide then the concentration of hydroxide (OH⁻) ions increases.

Answer 8=Carbon dioxide is evolved.
Answer 9= alcium hypochlorite is also an ingredient in bleaching powder, used for bleaching cotton and linen. It is also used in bathroom cleaners, household disinfectant sprays, moss and algae removers, and weedkillers. In addition, calcium hypochlorite may be used to manufacture chloroform.

Answer 10= CaOCl2 + CO2 = CaCO3 + Cl2

Answer 11= what happens chemically when quicklime is added to water filled in a bucket? When Calcium oxide i.e. quick lime is added to water filled in a bucket, it reacts vigorously with water to produce slaked lime  releasing a large amount of heat.

Answer 12=Acids react to reactive metals.
Acids react to bases.

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Questions
(1) Baking powder is a mixture of tartaric acid and starch.
(2) a mixture of dyes that changes colour gradually over a range of pH and is used (especially as indicator paper) in testing for acids and alkalis.
(3) the chemicals made of common salt are hydrochloric acid and sodium hydroxide.
(4)  the cake become when the baking soda and other ingrediants are added to the cake.
(5) the PH value is 5 after which the teeth start decaying.
(6)

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ans 1- sodium bicarbonate and water.

ans 2:universal indicator is a pH indicator composed of a solution of several compounds that exhibits several smooth colour changes over a pH value range from 0 to 14 to indicate the acidity or alkalinity of solutions, where 7 indicates neutral
and3: calcium carbonate and calcium silicate
ans 3- calcium carbonate and calcium silicate
ans4- due to the properties of baking soda, it cause  the cake to expand
ans 5- 5.5
ans 6- used to cure the irritations caused by insect bites
used to make the cake fluffy
it is also used to neutrillize boday odour
ans9- properties of bleaching powder-
strong smell of chlorine
yellowish-white in colour
soluble in water
uses-
clean clothes
clean water
to clear away molds

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Baking powder contains a combination of baking soda, an acid like � cream of tartar and a moisture absorber like cornstarch.
2

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question 1:
The two ingredients are acidic: they combine with the sodium bicarbonate and water to produce the gaseous carbon dioxide.

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2. A mixture of dyes that change their color gradually over a range of pH and is used in Testing acids and alkalis.
3. The chemicals made of common salt are Calcium carbonate and Calcium Silicate.
4. If baking soda is mixed with the other ingredients that are  used to bake a cake, it causes the mixture to expand. Therefore making it light and fluffy.
5. The pH value after which the tooth starts decaying is 5.5.
6. Baking Soda is used to:-
i) To freshen our mouth.
ii) To polish our teeth.
iii) To relieve itching.
9. Properties of Bleaching powder:
i) Soluble in water (alkali).
ii) Yellowish-white in color.
iii) Strong smell of chlorine.
Uses of Bleaching powder:
i) Water treatment.
ii) Maintain white clothes.
iii) To clear away the molds.
11. When quick lime is added to water, they react to form slaked lime. And release heat.
12. Properties of acids:
i) Acids are sour.
ii) Acids turn blue litmus red.
iii) Acids contain H+ ions.
iv) Acids pH value is from 0-7.
v) They are liquids.
vi) Turn universal indicator from green to red

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1) Sodium Bicarbonate  and water.
2) Universal indicator can show us exactly how strongly acidic or a solution is.
3)  -- Magnesium carbonate
-- Silicon oxide
-- Magnesium oxide
-- Calcium carbonate
4) Baking soda creates a reaction that puts little carbon dioxide bubbles into the cake, like the ones in fizzy drink. These bubbles leave little pockets of air in the cake when it is cooked which makes it lighter and fluffier.
5) If the PH value of our teeth goes less than 5.5, our tooth will begin to decay.
6) --Relieve Skin Irritation-Add a cup of baking soda to bathwater to soften your skin and relieve skin irritations.
--Relieve heartburns- Baking soda is a safe antacid. Learn more here.
--Relieve insect bites- Make a simple paste of water and baking soda and apply as a salve onto affected skin.
7) When excess base is dissolved in the solution of sodium hydroxide then the concentration of hydroxide ( OH-) ions increases.

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ANS 1 : SODIUM BICARBONATE AND CARBONDIOXIDE.

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1.  Name two constituents of baking power.      (1 mark)
2.  What is universal indicator?      (1 mark)
3.  Name the chemicals that can be made of common salt      (1 mark)
4.  Why does cake become fluffy after adding baking soda?      (1 mark)
5.  Write the pH value, after which teeth start decaying?      (1 mark)
6.  State some uses of baking soda?      (2 marks)
7.  How is the concentration of hydroxide ions      (OH-) affected when excess base is dissolved in a solution of sodium hydroxide?      (2 mark)
8.  Name the gas evolved when dilute sulphuric acid acts on sodium carbonate.Write the chemical equation for the reaction involved.      (2 mark)
9.  What are the properties and uses of bleaching powder?(3 marks)
10.  Write a chemical formula to represent the action of atmospheric CO2 gas on bleaching powder when left exposed in open.      (2 marks)
11.  What happens when quick lime is added to water?      (2 marks)
12.  Write any two properties of acids.      (2 marks)

answer 1 = The last two ingredients are acidic: they combine with the sodium bicarbonate and water to produce the gaseous carbon dioxide.

Answer 2 = a mixture of dyes that changes color gradually over a range of pH and is used (especially as indicator paper) in testing for acids.

Answer 3 = Salt is used to bleach wood pulp. It also is used to make sodium chlorate,

Answer 4=  Baking soda causes the cake mixture to expand, allowing air in. It is this air which causes the cake to become light and fluffy.

Answer 5=  Saliva can help neutralize the acid, but the pH of saliva can become more acidic after eating acidic foods. ... In that time, the lower pH of the mouth creates an optimal environment for bad bacteria, which eventually causes tooth decay.

Answer 6=
Freshen your breath. Mix 1 tsp of baking soda in a glass of water.
Polish your teeth. Many people will use baking soda as a natural toothpaste.
3. Make your own deodorant.
Gently exfoliate.
Relieve Skin Irritation.
Relieve heartburn.
Relieve insect bites.
Answer 7= When excess base is dissolved in the solution of sodium hydroxide then the concentration of hydroxide (OH-) ions increases.
Answer 7= When excess base is dissolved in the solution of sodium hydroxide then the concentration of hydroxide (OH-) ions increases.

Answer 8=Carbon dioxide is evolved.
Annswer9 : properties of bleaching powder-
strong smell of chlorine
yellowish-white in colour

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ans 1.Most commercially available baking powders are made up of sodium bicarbonate (also known as baking soda or bicarbonate of soda) and one or more acid salts. Typical formulations (by weight) call for 30% sodium bicarbonate, 5-12% monocalcium phosphate, and 21-26% sodium aluminum sulfate.

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ans 1.Most commercially available baking powders are made up of sodium bicarbonate (also known as baking soda or bicarbonate of soda) and one or more acid salts. Typical formulations (by weight) call for 30% sodium bicarbonate, 5-12% monocalcium phosphate, and 21-26% sodium aluminum sulfate.

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ans 2.  a mixture of dyes that changes colour gradually over a range of pH and is used (especially as indicator paper) in testing for acids and alkalis.
ans 3. the chemicals that can be made by common salt are calcium carbonate and

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1.baking powder is a mixture composed of baking soda ,tartaric acid and starch.it is used to making cakes, breads and other  baked  food item
2.a mixture of dyes that changes the colour .
3. calcium ,carbonate
4.if  baking soda is mix with other ingredients that are used to make bake a cake