Chemistry 9701 · AS & A Level · Group 17

Group 17 — practice question

Chlorine is made by electrolysing brine, which is concentrated aqueous sodium chloride.
(a(i))[4]

Using a fully labelled diagram, describe the industrial electrolysis of brine in a diaphragm cell. Indicate the material of each electrode and show the brine inlet and the product outlets clearly.

(a(ii))[2]

Provide a half-equation, including state symbols, for the process at each electrode. Anode: Cathode:

(a(iii))[1]

Name the chemical that forms in solution during this electrolytic process.

Worked solution & mark scheme

This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: titanium/graphite anode correctly identified

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI