(a) Here is an electrode reaction :
Cu→Cu2++2e−. At which electrode (anode or cathode) would such a reaction take place? Is this an example of oxidation or reduction ?
(b) A solution contains magnesium ions (Mg2+), iron (II) ions Fe2+ and copper ions Cu2+. On passing an electric current through this solution, which ions will be the first to be discharged at the cathode? Write the equation for the cathode reaction.
(c) Why is carbon tetrachloride, which is a liquid, a non-electrolyte ?
(d) During the electrolysis of molten lead bromide, which of the following takes place ?
A. Bromine is released at the cathode,
B. Lead is deposited at the anode,
C. Bromine ions gain electrons,
D. Lead is deposited at the cathode.