A student sets up the electrolysis of a concentrated aqueous solution of sodium chloride (NaCl\text{NaCl}NaCl) using inert graphite electrodes, as shown in the diagram below.
Which of the following correctly identifies the products formed at the cathode (negative electrode) and the anode (positive electrode)?
Cathode: sodium (Na\text{Na}Na); Anode: chlorine (Cl2\text{Cl}_2Cl2)
Cathode: hydrogen (H2\text{H}_2H2); Anode: chlorine (Cl2\text{Cl}_2Cl2)
Cathode: hydrogen (H2\text{H}_2H2); Anode: oxygen (O2\text{O}_2O2)
Cathode: sodium (Na\text{Na}Na); Anode: oxygen (O2\text{O}_2O2)
Electrolytic processes Questions
Practise Edexcel GCSE Chemistry Electrolytic processes with exam-style questions for Foundation and Higher tier. 100 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.