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Question

A metal article is to be electroplated with silver. The electrolyte selected is sodium argentocyanide. Write the reaction taking place at the cathode.


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Solution

Electroplating is a process in which the coating of metal is done with a thin layer of another metal.

  1. Cathode is a negative terminal that attracts the positively charged particles. The reduction process will occur at the cathode by the gain of the electrons.
  2. Reaction at cathode: The silver ions gain electrons from the electrolyte to form a silver atom. These atoms get deposited on the metal article as a thin layer of silver.

Ag+(aq)+e-Ag(s)SilverionSilveratom


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