French Concerns

 Essay about French Concerns


Chemical Lab

10. 12. 2012

Period 3-4

Purpose/Objective: The purpose/objective on this lab was going to see if environmental conditions transformed the speed from the reaction. The catalyst being used was the spark (the match). The Reaction being examined was how fast the hydrogen peroxide could turn into water and oxygen. The idea that was being tested was; Enzymes increase reactions. The facts that I planned to determine had been matches making the chemical reaction happen more rapidly or not. Materials:

-Test Tubes-Chicken Liver-Sand-Ice-Glass Stirring Rod-Hydrochloric Chemical p -Hydrogen Peroxide


1) Placed on safety glasses

2) Acquire test pipes

3) Set chicken liver organ in your five of 6th test pontoons, an fine sand in all in the test pontoons 4) Acquire beaker of Hydrogen peroxide with a dropper

5) Place all 6th test tubes in the vacant beaker

6) Fill test tube #1 with fine sand and some liver. Utilize the glass mixing rod to crush the liver and sand jointly. 7) Fill up test tube #2 with sand nevertheless DO NOT crush the item of liver. 8) Fill test out tube #3 with a piece of liver and sand. Then simply place this test tube into a breaker of ice. Set this beaker apart for for a long time. 9) Load test conduit #4 with sand and a piece of liver. Then put 1mL of hydrochloric acid solution into the test tube and set it aside for for a long time. 10) Complete test tube #5 with sand and a piece of hard working liver. Then put 1mL of Hydrogen Peroxide. 11) Intended for test tube #6, put in a crunch of yellow sand and leave it that way. 12) Record findings

13) Once finished, maintain goggles in, clean out check tubes, return them to test tube holder, put away the goggles once everyone is done, and then go back to your seats quietly.


Post-Lab Questions:

1) What is a great Enzyme? Exactly what are their jobs in chemical reactions? A: A great enzyme can be described as catalyst and it either starts, or perhaps speeds up a chemical reaction simply by lowering the activation strength without being transformed or utilized.

2) Describe what happened to check tube two when hydrogen peroxide was added to the liver. What gas was produced? What liquid was left? A: When the Hydrogen Peroxide was added to the liver, it started to bubble and yellow-colored liquid was left. The gas that was developed was oxygen and the liquefied left behind was water.

3) What factors could have influenced the rating of the chemical reaction between the hard working liver and the hydrogen peroxide? Give two factors. Explain every. A: The reaction in check tube 2 was exothermic because the check tube received hotter and energy was released.

4) What factors could have influenced the rating from the chemical reaction between your liver and the hydrogen peroxide? Give two factors. Explain each. A: The two factors that could have influenced the rating with the chemical reaction were the facets and stomach acids and the temperature. The facets and stomach acids could have affected the ranking because they change the pH. The temperatures could have inspired the rating because lower temperatures often slow down reactions while larger temperatures usually speed them up.

5) What result does temp have for the activity level on an chemical? A: Heat has an effect on the game level by using an enzyme since heat can easily raise the rate of reaction. On the other hand, by causing the environment colder, it will slow down the reaction down.

6) Is there a control group through this experiment? If so which tube offered as a control? A: The control group was test out tube 6, containing just sand. This is due to every evaluation tube experienced sand and liver in it but test conduit #6, this kind of allowed 1 variable being tested.

7) Why does the glowing splint test light?

A: The excellent splint test lights up mainly because when the match hit the hydrogen peroxide, it induced a reaction which in turn caused the splint to illuminate.

8) What was the purpose of adding sand to the test tubes?

A: The objective of adding crushed stone to the check tubes was so that the yellow sand could cut the lean meats up and release catalase, which are the digestive enzymes...