CAIE A Level Chemistry 9701 · Electrochemistry
Molten lead(II) bromide, , is electrolysed using inert graphite electrodes.
Describe the observations at each electrode and explain why these products are formed. In your answer, refer to the movement of ions and the electrode reactions.
5 marks, so the mark scheme is looking for about 5 separate creditworthy points. Making the same point twice in different words earns it once.
Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.
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