Electrodes are placed into three different aqueous solutions, XXX, YYY, and ZZZ. A low-voltage direct current (d.c.) power supply is connected to the electrodes. Any products formed at the anode and cathode are identified. The results are shown in the table below.
| Solution | Conducts electricity | Product at cathode | Product at anode |
|---|---|---|---|
| XXX | Yes | Silver | Oxygen |
| YYY | Yes | Hydrogen | Chlorine |
| ZZZ | No | None | None |
Explain which solutions are electrolytes.
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.