Enzyme Lab

I never realized how easily a person can alter the pressure in a test tube with only a little water, H2O2, and yeast.

After mixing H2O2 and water in a test tube, we began our experiment by altering the number of yeast drops we put in the test tube.

The higher the number of yeast droplets, the higher the pressure kept climbing.


Next, we altered the temperature of the test tubes. We went back to mixing H2O2 with water in the test tube. Then, we left one at room temperature, one at 25 degrees, one at 38 degrees, and one at 80 degrees.

This graph is strange. The lowest temperature had the lowest pressure level. At 25 degrees the pressure level was slightly higher. Then, pressure spiked as it was at 38 degrees or warm. But, when the temperature was at 80 degrees, the pressure lowered slightly.


Lastly, instead of altering the number of yeast drops, we altered the pH level of the water concentration to determine how the pH level affects the pressure in the test tube.

The higher the pH levels, the higher the pressure. In two cases the cap actually popped off due to the increased pressure.
This lab taught me that little variable can affect pressure in a great way, making me wonder what else can affect pressure or other characteristics of chemicals...