Question

Draw a well labelled diagram of a conductivity cell. Also write net cell reactions involved in electrolysis of aqueous NaCl.

Answer 1

Conductivity cell

Net cell reaction in electrolysis of aqueous NaCl:

The net cell reaction is the sum of two electrode reactions.

\[\ce{2Cl^-_{ (aq)} -> Cl_{2(g)} + 2e^-}\]	(Oxidation half reaction at anode)
\[\ce{2H2O_{(l)} + 2e^- -> H_{2(g)} + 2OH^-_{ (aq)}}\]	(Reduction half reaction at cathode)
\[\ce{2Cl^-_{ (aq)} + 2H2O_{(l)} -> Cl_{2(g)} + H_{2(g)} + 2OH^-_{ (aq)}}\]	(Overall cell reaction)