How will the concentration of the Hydrogen Peroxide affect the rate of reaction with a constant amount of Manganese Oxide?
To find the relationship between the concentration of Hydrogen Peroxide and the rate of reaction with a constant amount of catalyst, Manganese Oxide.Introduction:
Hydrogen Peroxide(H2O2) is the simplest form of Peroxide and is used to bleach hair, paper, sterilize water, sterilize wounds and whiten teeth. Hydrogen Peroxide is a relatively stable compound, however over the time it will slowly decompose into oxygen and water. There are several factors that can increase the rate of breakdown,including high temperature, high concentration, and presence of catalyst. Catalyst are substances that make reactions take place more quickly. Catalyst breaks Hydrogen Peroxide into water and oxygen. On the other hand there are also several other factors that can slow down the rate of breakdown of Hydrogen Peroxide, including low temperature, and low lighting.
The chemical formula for this reaction is,
2 H2O2---->O2 + 2H2O
To see the relationship between the concentration of the Hydrogen Peroxide and the rate of reaction, this experiment is conducted by timing how long it takes until 70 ml of oxygen is produced.
It is assumed that when the concentration of the hydrogen peroxide increases, the rate of reaction will also increase provided that factors (such as amount of manganese oxide, temperature, hydrogen peroxide, solution, size and type of test tube) are kept constant. However when the number of hydrogen peroxide molecules exceed the available number of manganese oxide, the rate of reaction will no longer increase. So it is expected that the trend line will be leveled out and end as a curve.
The expected graph for this experiment is as follows:
Graph 1:The predicted relationship between the concentration of hydrogen peroxide and the rate of reaction