10/7/10 scribepost

Today in class we began by taking notes on Enzymes. After that, we learned about Catalysts and did an experiment with them. During the last fifteen minutes of class we did the prelab to the lab that we are doing in class tomorrow.


Enzymes

• proteins
• lock and key theory, specific
• effected by temperature and PH levels (the acidic level)
• can build or break down molecules

This image shows how an Enzyme uses a substrate to speed up a chemical reaction as a Catalyst.

Later, we learned about Catalysts and we did an experiment with them.

A Catalyst, speeds up the rate of a chemical reaction.

In this experiment we mixed hydrogen peroxide, added soap, then added potassium iodine (salt type) to speed up the process.









The column of bubbles that shot out of the cylinder was very hot but did smell very good. most likely because of the soap.



PH Scale

At the end of class we went over the prelab for the upcoming lab we will be doing tomorrow. It begins on page 24 and goes up to the graphs starting on page 30. In this lab we will be learning how temperature affects enzyme activity. Each group of Four that were announced today will be expected to complete this before the end of the period tomorrow.

Other:

homework was to finish the prelab if you didn't in class.

we will be having a substitute teacher for class tomorrow.