Question 1
F21%A student electrolyses molten lead bromide using graphite electrodes. Figure shows the apparatus.
Figure: Apparatus used by the student to electrolyse molten lead bromide
a.[2]
Name the two products of this electrolysis.
b.[2]
Explain why the lead bromide must be molten for this electrolysis to work.
c.[1]
Give one reason why graphite is a suitable material for the electrodes.
d.[1]
The student sees an orange brown gas above one of the electrodes. Give the electrode this gas forms at.
4.3 Electrolysis Questions
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.