Question 5(a)
[Maximum number: 1]
Hydrogen peroxide solution decomposes slowly at room temperature to form water and oxygen.
The equation for the reaction is
A catalyst increases the rate of this reaction.
State one other property of a catalyst.
Edexcel IGCSE Chemistry 3.12 catalyst definition
Practise catalyst-definition questions by explaining unchanged mass, faster rate and why yield is not increased in MnO2 practicals.
How this is tested
- State that a catalyst speeds up a reaction without increasing the final yield.
- Describe filtering, drying and reweighing MnO2 to show the catalyst is unchanged.
- Distinguish a catalyst from a reactant using the same mass left at the end.