1a3 marks
A steel spoon can be coated in silver using electrolysis. The spoon must be very clean and free of grease.
Suggest
i)
one advantage of putting a thin layer of silver on the spoon,
[1]
ii)
one disadvantage if the spoon is used frequently,
[1]
iii)
why the spoon must be very clean and free of grease?
[1]
1b1 mark
Which electrode should be the spoon?
1c1 mark
Identify the metal from which the other electrode is made.
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