Question

Write down the ionic equation for the reactions that take place at the cathode during the electrolysis of an aqueous solution of nickel sulfate.

Answer 1

Cathode reaction during the electrolysis of an aqueous solution of nickel sulfate.

• The reduction half-reaction occurs at the cathode.
• The cathode used here is the article to be electroplated in electroplating with nickel
• The positively charged ${\mathrm{Ni}}^{+2}$ ions are discharged at the cathode by accepting electrons and deposited as a thin film of metallic nickel on the cathode

${\mathrm{Ni}}^{+2}+2{\mathrm{e}}^{-}\to \mathrm{Ni}$