A student investigated the electrolysis of dilute sodium sulfate solution. They measured the volumes of hydrogen gas and oxygen gas collected over a period of 12 minutes.
Their results are shown in the table below.
| Time (minutes) | Volume of hydrogen produced (cm3\text{cm}^3cm3) | Volume of oxygen produced (cm3\text{cm}^3cm3) |
|---|---|---|
| 0 | 0.0 | 0.0 |
| 3 | 5.0 | 2.5 |
| 6 | 10.0 | 5.0 |
| 9 | 15.0 | 7.5 |
| 12 | 20.0 | 10.0 |
Describe, using the data in the table, what the results show about the volumes of hydrogen and oxygen produced during this experiment.
83 exam-style questions on Edexcel GCSE Chemistry 4.2 Electrolytic processes, covering 4.2.1 Electrolytes and the process of electrolysis, 4.2.2 Products of electrolysis using inert electrodes, 4.2.3 Half equations, oxidation and reduction in electrolysis, and 4.2.4 Electrolysis of copper sulfate and purifying copper. Each one has a worked solution and a mark scheme showing where the marks go.