Lab Report Yeast Enzyme Experiment

For this experiment, we started off by taking tubes numbered 1-4 and started adding one scoop of our enzyme catalyst, in this case, the yeast. We then proceeded to measure and add 1 mL of distilled water to test tubes A-D. To get a more accurate measure of 1 mL of distilled water, we used the dropper labeled “W” to drop distilled water into the 5 mL graduated cylinder until we saw that the bottom of the water line reached closely to 1 mL. Next, we took the four tubes with the scoop of yeast and added to each the corresponding 1 mL of water from tubes A-D. As soon as each tube had the 1 mL of water we put the timer for exactly ten minutes and waited for the yeast or our enzyme to “activate”. During the ten minutes, my partner and I started preparing our 0%, 25%, 50% and our 100% Hydrogen Peroxide solution.
Tahmaseb and poured a generous amount into the tube labeled D. We then took the 5 mL graduated cylinder and the dropper labeled “H” and started dropping drops of Hydrogen Peroxide or H2O2 until it measured 1 mL of H2O2. We then took that 1 mL of H2O2 and poured it in test tube labeled C, we then proceeded to measure 1 mL of water and also added it to the test tube labeled C. This would give us a 50% concentrate solution. Since we had 2 mL and only needed 1 mL of 50% concentrate solution, we took out exactly 1 mL of that solution and poured it into the test tube label B. In order to obtain a 25% concentrate solution in test tube B, we measured and added 1 more mL of distilled water. Once the 50% solution and the 1 mL of water were well combined, we had a 25% concentrate