A student adds marble chips (calcium carbonate) to dilute hydrochloric acid in a conical flask. She collects the gas produced and measures its volume every 30 seconds.
The table shows her results.
| Time in s | 0 | 30 | 60 | 90 | 120 | 150 | 180 |
|---|---|---|---|---|---|---|---|
| Volume of gas in cm3\mathrm{cm^{3}}cm3 | 0 | 28 | 46 | 57 | 62 | 64 | 64 |
Name the gas produced in this reaction.
Name a piece of apparatus the student could use to collect and measure the volume of the gas.
Give the volume of gas collected after 60 s.
State the time by which the reaction had stopped. Give a reason for your answer.
Describe how the rate of the reaction changes as the reaction goes on.
Give one other measurement the student could make to follow the rate of this reaction.
54 exam-style questions on Edexcel GCSE Chemistry 8.1 Rates of reaction, covering 8.1.1 Measuring and interpreting rates of reaction, 8.1.2 Collision theory and the factors affecting rate, and 8.1.3 Catalysts and enzymes. Each one has a worked solution and a mark scheme showing where the marks go.