A food manufacturer investigates enzyme G in a reaction. In one trial, enzyme G is added to the reactant. In a second trial, no enzyme is added. The same mass of reactant and the same conditions are used in both trials.
| Time in minutes | Product mass with enzyme G in g | Product mass without enzyme G in g |
|---|---|---|
| 0 | 0 | 0 |
| 4 | 31 | 15 |
| 8 | 40 | 29 |
| 12 | 40 | 40 |
At 12 minutes, both reactions have stopped and no further product is formed.
Explain the results of the investigation and evaluate the manufacturer's claim that enzyme G increases both the rate of reaction and the amount of product formed.
127 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.