Two clear, colourless solutions, reactant X and reactant Y, react together in a conical flask to produce a cloudy white precipitate.
To investigate how different factors affect the rate of this reaction, a student placed the conical flask on top of a sheet of paper marked with a black circle. They measured the time taken for the precipitate to completely obscure the circle when viewed from above.
Their results are shown in the table below:
| Experiment | Concentration of reactant X in mol/dm3\text{mol/dm}^3mol/dm3 | Temperature in ∘C^{\circ}\text{C}∘C | Time taken for circle to disappear in s\text{s}s |
|---|---|---|---|
| 1 | 0.1 | 25 | 240 |
| 2 | 0.1 | 45 | 60 |
| 3 | 0.4 | 45 | 15 |
Use the results in the table to explain, in terms of collision theory, the effect of changing the temperature and the effect of changing the concentration of reactant X on the rate of this reaction.
