A student constructs a simple chemical cell by placing magnesium and copper electrodes into dilute sulfuric acid. After being connected in a closed circuit with a small light bulb for a long period, the bulb goes out and the voltmeter reading falls to 0 V.
State one reason why the voltage of this chemical cell eventually decreases to 0 V.
42 exam-style questions on Edexcel GCSE Chemistry 6.4 Chemical cells and fuel cells, covering 6.4.1 Chemical cells and fuel cells. Each one has a worked solution and a mark scheme showing where the marks go.