Rates of Reaction
Catalysts used for the Decomposition of Hydrogen Peroxide.
The presence of a catalyst may cause it to decompose quickly.
peroxide oxygen + water.
2H2O2(aq) O2(g) + 2H2O(l)
The rate of the reaction
can be followed
by recording the volume of oxygen produced
(you must know a test for oxygen).
The catalyst used is Manganese(IV)
oxide - MnO2(s)
Using more catalyst will show an increase in reaction rate.
This is because more catalyst will have a
greater surface area for the reaction to take place.
The reaction can be performed using different
compare how well each catalyst works for the same reaction.
A fair test must use the same amount of each catalyst.
As you can see from the
graph, Manganese(IV) oxide
is the best catalyst for this reaction.
The gradient of the plot is greater (steeper) than the other two.
Copper(II) oxide (CuO(s)) is not as good as manganese(IV) oxide
but is better than zinc oxide (ZnO(s)).
Rates of Reaction Catalysts and Energy Search Questions
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