Mohammed Jazara's Science Notebook

What are catalysts?

 

Materials:

• Graduated cylinder

• yeast

• hydrogen peroxide

• Dish washing detergent solution

 

Procedure:

1. Add 10 mL of hydrogen peroxide to a graduated cylinder.

2. Add 1 drop of detergent solution.

3. Swirl gently and watch the solution for any bubbling.

4. Add a small amount of yeast to the hydrogen peroxide in the graduated cylinder and swirl.

5. Place the graduated cylinder on the table and watch for any bubbling.

6. Hold the graduated cylinder to see if there seems to be any change in temperature.

 

Observations:

* The liquid began to bubble once we put the small amount of yeast mixed with hydrogen peroxide and the detergent solution.

* The temperature of graduated cylinder became colder

Conclusion:

The chemicals changed and became warmer. It became a whole new