Question
Edexcel Paper 1 — Higher
Lead bromide (PbBr₂) is electrolysed when molten.
(a) Explain why solid lead bromide does not conduct electricity, but molten lead bromide does. (2 marks) (b) Write the half-equation for the reaction at the anode. (2 marks) (c) Write the half-equation for the reaction at the cathode. (2 marks) (d) Which electrode undergoes oxidation? Explain how you know. (2 marks)
8 marks · take your time before peeking.
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Generated by TopMyGrade AI · cross-check official sources before relying on the mark-scheme phrasing.