A solid reactant reacts with a reactant in solution. Four experiments use the same mass of solid and the same volume of solution. The only differences between the experiments are shown in the table.
| Experiment | Concentration of solution in mol/dm3\text{mol/dm}^3mol/dm3 | Temperature in ∘C^\circ\text{C}∘C | Form of solid |
|---|---|---|---|
| K | 0.50 | 20 | granules |
| L | 0.50 | 35 | powder |
| M | 1.00 | 20 | powder |
| N | 1.00 | 35 | granules |
Which experiment should have the slowest initial rate? Explain your answer in terms of particles.
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.