Table shows four solutions that were electrolysed using inert electrodes.
Table: The products formed at each electrode when four solutions are electrolysed using inert electrodes
| Solution | Product at the negative electrode | Product at the positive electrode |
|---|---|---|
| Copper sulfate solution | copper | oxygen |
| Potassium bromide solution | ||
| Silver nitrate solution | silver | |
| Magnesium chloride solution | chlorine |
Complete Table.
Write the half equation for the reaction at the negative electrode in the electrolysis of copper sulfate solution.
Write the half equation for the reaction at the positive electrode in the electrolysis of copper sulfate solution.
Explain why bromine, and not oxygen, is produced at the positive electrode with potassium bromide solution.
40 exam-style questions on AQA GCSE Chemistry 4.3 Electrolysis, covering 4.3.1a The process of electrolysis, 4.3.1b Half equations in electrolysis, 4.3.2 Electrolysis of molten ionic compounds, 4.3.3 Using electrolysis to extract metals, 4.3.4 Electrolysis of aqueous solutions, and 4.3.5 Representation of reactions at electrodes as half equations. Each one has a worked solution and a mark scheme showing where the marks go.