Hydrogen Peroxide in the Presence of Yeast Essay

A number of different variables, such as the concentration of the hydrogen bleach solution or the temperature at which the reaction occurs, can affect the rate at which yeast breaks master hydrogen peroxide. To prove this we first examened the solution with 3% concentration of peroxide, the paper that was soaked in yeast rose in 1.7 seconds. After that we changed our concentration to 2.25%, 1.5%, and .75% of hydrogen peroxide to see the effects it had on the sum total of time it took the felt to completely drop and rise. On 2.25% it took 2.8 seconds, 1.5% took 3.2 seconds, and .75% took 3.9 seconds.Introduction When yeast and hydrogen peroxide react, the peroxide decomposes into water and oxygen gas causing bubbles to form. These bubbles cause the felt to rise.Problem In this look into we measured how long it took for the piece of felt soaked in a yeast solution to unload and rise in the test tube. The amount of time it takes for the felt to sink and rise indicates how oxygen bubbles ar formed, as hydrogen peroxide is broken cumulation.Hypothesis The amount of hydrogen peroxide directly influences the amount of time it takes to break down the yeast resulting in tiny bubbles, and the felt to rise to the top of the test tube.Procedure Supplies total heat Peroxide Yeast suspension 4 felt disks 5 test tubes quantify Forceps 5 paper cups Graduated cylinderResults See Graph on Lab Sheet compend and Conclusion- For this experiment our dependent variable was the paper with yeast on it, and our independent variable was the concentration of Hydrogen Peroxide we put in each solution. We tested the amount of time it took for the peroxide to break down yeast at 3%, 2.25%, 1.5%, .75% and 0% concentration. The fastest reaction time was 1.7 at 3% concentration. We nominate out that with no Hydrogen Peroxide the yeast does not float back to the top. So the write down concentration of Hydrogen Peroxide the longer it took to float back to the top.