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Part one

1. a ) When H peroxide was added to manganese. bantam bubbles formed in the solution- strength of ( 1 ) .

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B ) The solution did non alter in temperature.

degree Celsius ) The bubbles stopped organizing after about 18 proceedingss.

2. After we added 2 more milliliter of H peroxide. the reaction occurred once more. Again. little bubbles formed ; strength of ( 1 ) . The solution did non alter in temperature. The reaction lasted about 15 proceedingss.

3. After adding more manganese dioxide. the reaction occurred once more. This clip. the bubbles being formed were larger ; strength of ( 4 ) . The solution got a small heater. but the difference in temperature was barely distinguishable by merely touching the trial tubing. The reaction lasted about 10 proceedingss.

4. a ) The H peroxide is used up and the manganese dioxide remains unchanged.

Part two

Title: Enzyme Function

Purpose: To detect the function of enzymes in chemical reactions and to find the sorts of cells that contain more of the enzyme catalase.

Anterior Knowledge:

Enzymes are proteins that help the chemical reactions of a cell by take downing the sum of activation energy needed to get down the reactions. thereby enabling the cell to transport out the reactions at a faster rate ; enzymes that lower the activation energy are hence called accelerators. Furthermore. the enzyme itself is non destroyed in the procedure. Hydrogen peroxide is a substrate broken down into O and H2O by the enzyme catalase. Sand and chalk are nonliving. so they do non hold accelerators. Spinach and murphies have enzymes to assist rush up chemosynthesis and make a by-product of H peroxide. Ground beef and cooked liver both have a high sum of enzymes because they are found in heterotrophic life beings.

Hypothesis/predictions

We thought that the degree of strength and heat in the different trial tubing would travel in this order from greatest to least: natural liver. natural beefburger. boiled liver. murphy. Spinacia oleracea foliage. calk. and eventually sand.

We based our hypothesis on the thought that populating things have enzymes to rush up chemical reactions. The natural liver and beefburger would hold the most since they were the 1s that were least altered from a living thing.

The poached liver was following since heat can falsify enzymes. and if excessively many enzymes had their forms changed by heat. they would non be able to interrupt down the H peroxide as expeditiously. or non at all. Following came the 2 workss.

We predicted chalk and sand to be the least reactive. since they are nonliving and likely have really few to no enzymes to interrupt down the H peroxide.

Consequences:

Intensity ( graduated table of 0-10 with 10 being really intense )

Thermal/ heat give off

Time/ continuance

Manganese

Bantam bubbles formed in the solution- strength of ( 1 ) .

The solution became 5 % heater.

The bubbles stopped organizing after about 18 min.

Spinach foliage

Bantam bubbles formed in the solution- strength of ( 2 ) .

The solution did non alter in temperature.

The bubbles stopped organizing after about 5 min.

Raw liver

The solution started fizzing- strength of ( 10 ) .

The solution became 60 % heater.

The solution stopped foaming after about 1 min.

Cooked liver

Bubbles formed in the solution- strength of ( 6 ) .

The solution did non alter in temperature.

The bubbles stopped organizing after about 2? min.

Land Beef

Bubbles formed in the solution- strength of ( 4 ) .

The solution did non alter in temperature.

The bubbles stopped organizing after about 8 min.

Potato

Bubble formed in the solution- strength of ( 4 ) .

The solution did non alter in temperature.

The bubbles stopped organizing after about 5 min.

Chalk

Barely any bubbles formed in the solution- strength of ( 0. 5 ) .

The solution did non alter in temperature.

The bubbles stopped organizing after about 4 min.

Sand

There was no chemical reaction- strength of ( 0 ) .

The solution did non alter in temperature.

No chemical reaction was observed.

Conclusion/Discussion

The consequences for each substance by and large supported our hypothesis. Raw liver had the quickest and most intense reaction because of the copiousness of accelerators present due to the fact that it came from a living thing. The sand and chalk had no reaction because they are nonliving. There are no enzymes in sand or chalk so no chemical reaction with H peroxide can take topographic point. The cooked meat did non hold every bit great a reaction as the natural meat because when it’s cooked. cellular respiration takes topographic point. bring forthing H peroxide as a by-product. A big part of the chemical reaction had already occurred so when we tried to do the reaction take topographic point once more. it was of a much less strength. The autophytic substances had a medium sized reaction because they have accelerators in order to finish chemosynthesis. Because H peroxide is a by-product of chemosynthesis. they will hold a minor reaction to the H peroxide we introduce to them. The reactions were exergonic. and released energy in the signifier of heat. thermic energy. When it’s cooked. cellular respiration takes topographic point. bring forthing H peroxide as a by-product

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