https://padlet.com/gragrego20/u6a2lmocgmh0 Created by Grace Gregory en-us 2018-02-20 15:55:24 UTC 2026-03-17 08:23:36 UTC hello@padlet.com gragrego20 https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234079259 2018-02-22 04:34:28 UTC https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234079259 gragrego20 https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234079274 We will systematically prove that the liver, which contains the enzymes, is going to break down the peroxide into both water and oxygen. What could be done to prove that pure oxygen is being produced? 

]]> 2018-02-22 04:34:37 UTC https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234079274 gragrego20 https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234079307 Every cell in your body produces peroxide when it goes through chemical reactions. Unfortunately, peroxide is poisonous to humans. Your body created a way to break down the peroxide, one way is catalase. Catalase is made by every cell in your body and when it breaks down peroxide, it turns it into water and oxygen.]]> 2018-02-22 04:34:53 UTC https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234079307 gragrego20 https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234079339

5 test tubes

Hot place (to boil water)

5 small pieces of cow liver

Test tube holders

2 Transfer pipettes (for both; water & peroxide)

2 20mL graduated cylinders (for both; water & peroxide)

10mL H2O2 (Hydrogen Peroxide) Substrate

10mL H2O (Water) 

Multiple wooden splints 

Matches

]]> 2018-02-22 04:35:09 UTC https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234079339 gragrego20 https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234079382 Test Tube 1 (Controlled Substance)

1. Place water into test tube until 2 cm mark on tube
2. Add a piece of liver into test tube

Test Tube 2

1. Place peroxide into test tube until 2 cm mark on tube
2. Add a piece of liver into test tube

Test Tube 3

1. Place peroxide into test tube until 2 cm mark on tube
2. Light a wooden splint on fire (using matches) 
3. After letting the wooden splint burn, blow out flame
4. Leave the splint end glowing red, put glowing red splint into peroxide

Test Tube 4

1. Place peroxide into test tube until 2 cm mark on tube
2. Add a piece of liver into test tube
3. Light a wooden splint on fire (using matches)
4. After letting the wooden splint burn, blow out flame
5. Leave the splint end glowing red, put glowing red splint into the bubbling reaction
6. Blow out flame on the wooden splint 
7. Repeat 6-7; shows how the flame is repeatedly produced

Test Tube 5

1. Place water into test tube until 2 cm mark on tube
2. Add a piece of liver into test tube
3. Boil test tube (using hot place)
4. Place peroxide into test tube until 4 cm mark on tube

]]> 2018-02-22 04:35:32 UTC https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234079382 gragrego20 https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234080612 -no reaction took place 
-something was missing? within the reaction]]> 2018-02-22 04:46:32 UTC https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234080612 gragrego20 https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234080652 -reaction took place; bubbles rise out of test tube
the peroxide is being turned into water and oxygen]]> 2018-02-22 04:46:56 UTC https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234080652 gragrego20 https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234080717 -no reaction took place 
-peroxide isn't flammable]]> 2018-02-22 04:47:30 UTC https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234080717 gragrego20 https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234080742 -reaction took place; flame is produced when glowing red splint is placed into the bubbling reaction
-oxygen is what is being given off by this reaction(b/c pure oxygen in the presence of a spark creates a fire)]]> 2018-02-22 04:47:51 UTC https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234080742 gragrego20 https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234080807 -no reaction took place 
-no oxygen is being put off when the temperature of the enzyme drastically changes]]> 2018-02-22 04:48:22 UTC https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234080807 gragrego20 https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234080877 Enzymes are biological molecules of protein which speed up chemical reactions in living things.]]> 2018-02-22 04:49:05 UTC https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234080877 gragrego20 https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234080899 When hydrogen peroxide was added to the liver, a gas containing oxygen and water was produced. After the chemical reaction, liquid water was left behind.]]> 2018-02-22 04:49:20 UTC https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234080899 gragrego20 https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234080931 The flame is being produced in test tube 4 because oxygen is what is being given off by this reaction. Pure oxygen in the presence of a spark (red hot wood) creates a fire.]]> 2018-02-22 04:49:38 UTC https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234080931 gragrego20 https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234080954 Enzymes need some energy to work so low temperatures can cause slow reaction rates. Higher temperatures can denature the enzyme and stop it from working altogether, proven from the reaction in test tube 5.]]> 2018-02-22 04:49:52 UTC https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234080954 gragrego20 https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234080974 Through the reactions, and lack of them I was able to systematically prove that the liver, which contains the enzymes, is going to break down the peroxide into both water and oxygen. I was able to do so by comparing different reactions within a controlled experiment.]]> 2018-02-22 04:50:06 UTC https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234080974 gragrego20 https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234081210 2018-02-22 04:52:34 UTC https://padlet.com/gragrego20/u6a2lmocgmh0/wish/234081210