Two different catalysts, A and B, were used for the decomposition of hydrogen peroxide solution. The activation energy of the reaction was 42 kJ/mol using catalyst A and 27 kJ/mol using catalyst B.
The table shows the volume of oxygen collected after 60 s using each catalyst.
Table: The volume of oxygen collected after 60 seconds using catalyst A and using catalyst B
| Catalyst | Volume of oxygen collected after 60 s (cm3) |
|---|---|
| A | 31 |
| B | 58 |
Explain why catalyst B gives a faster rate of reaction than catalyst A.
Use the table and the activation energy data.
The same mass of each catalyst was recovered at the end of each experiment.
Explain what this shows about the catalysts.
41 exam-style questions on AQA GCSE Chemistry 6.1 Rate of reaction, covering 6.1.1a Calculating rates of reactions, 6.1.1b Gradient of a tangent as rate, 6.1.2 Factors which affect the rates of chemical reactions, 6.1.3 Collision theory and activation energy, and 6.1.4 Catalysts. Each one has a worked solution and a mark scheme showing where the marks go.