(a)[4]
Identify every particle that carries electric charge in graphite, magnesium ribbon and molten copper(II) bromide.
(b(i))[1]
Suggest the name of a metal that could be used for the inert electrodes.
(b(ii))[1]
Name the gas produced at the positive electrode.
(b(iii))[3]
Write an ionic half-equation for the reaction at the negative electrode. Include state symbols.
(b(iv))[3]
How, if at all, does the pH of the solution alter during the electrolysis? Explain your answer.
(c(i))[1]
Draw an arrow on the diagram to indicate the direction of electron flow.
(c(ii))[2]
Suggest the change, if any, in the voltmeter reading if the zinc electrode were substituted by an iron electrode. Explain your answer.
(c(iii))[1]
Suggest why the sign of the voltmeter reading changed and became negative.