A technician tests a coating process for a steel electrical contact using an aqueous solution containing silver ions and a strip of silver. In the trial, the steel contact is connected to the positive terminal of a direct current supply and the silver strip to the negative terminal.
Explain whether the trial will coat the steel contact with silver, where silver will form, and how the connections should be changed to coat the contact.
98 exam-style questions on OCR GCSE Chemistry 3.4 Electrolysis, covering 3.4.1 Products formed at the electrodes in electrolysis and 3.4.2 The technique of electrolysis. Each one has a worked solution and a mark scheme showing where the marks go.