A gas-producing reaction takes place in an open flask on a balance. In each test, the time is recorded when the mass of the flask and contents has decreased by 0.60 g.
Under these conditions, multiplying the concentration of solution X by a factor multiplies the rate of reaction by the same factor. All other conditions are kept the same.
| Concentration of solution X (mol/dm3\text{mol/dm}^3mol/dm3) | Time for a mass decrease of 0.60 g (s) |
|---|---|
| 0.30 | 200 |
| 0.75 | not yet known |
Calculate the missing time in the table.
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.