Question

Determine products formed at cathode & anode and also write cell representation, is electrolysis of aqueous $NaCl$ is carried out with:

• A. Concentrated $NaCl$ using $Pt$ electrode
• B. Diluted $NaCl$ using $Pt$ electrode
• C. Concentrated $NaCl$ using $Hg$ as cathode
• D. Concentrated $NaCl$ using $Ag$ electrode

Answer 1

The correct option is A Concentrated $NaCl$ using $Pt$ electrode

aqueous $NaCl+H_{2}O$

Cathode : $H^{+}+\overline{e}\to 1/2H_2$

Anode : $C{l}^{-}\to 1/2C{l}_2+e^{-}$

Acid in solution : $N{a}^{+}+O{H}^{-}\equiv NaOH$