Why Does Hydrogen Peroxide React to Yeast?

Why Does Hydrogen Peroxide React to Yeast?

Why Does Hydrogen Peroxide React to Yeast?

In its decomposition, hydrogen peroxide reacts to yeast because it is a catalyst that speeds up the reaction time. When hydrogen peroxide decomposes naturally into to water and oxygen, it does so slowly.

However, by adding active yeast to a solution of peroxide, the reaction time speeds up. In middle school, one chemistry experiment that illustrates this reaction is the addition of 3 percent hydrogen peroxide, active yeast and a small quantity of dish soap. What happens is that oxygen gas bubbles produce quickly and the soap begins to create foam. This shows that the active yeast is a catalyst.