(a(i))[2]
State the meaning of the term electrolyte.
(a(ii))[1]
State the name used for the Roman numeral, (II), in the name copper(II) sulfate.
(a(iii))[1]
State the change in colour of the aqueous copper(II) sulfate as this electrolysis continues.
(a(iv))[2]
Write the ionic half-equation for copper forming at the cathode.
(a(v))[1]
Give the formula of the ion that produces oxygen at the anode.
(b)[1]
State the change that occurs at the anode.
(c(i))[3]
Name the materials used for the anode (positive electrode), the cathode (negative electrode) and the electrolyte.
(c(ii))[2]
State two reasons for electroplating spoons.
(d(i))[2]
State one harmful effect of carbon dioxide and one harmful effect of carbon monoxide.
(d(ii))[1]
State one disadvantage of using hydrogen-oxygen fuel cells for cars compared with petrol, apart from cost.