Chapter 21, Problem 88A

Interpretation Introduction

Interpretation: The method to remove the gold from a gold-plated object using an electrolytic cell needs to be explained.

Concept Introduction: In an electrolytic cell, electrical energy is used to generate a non-spontaneous redox reaction. The three components of an electrolytic cell are cathode, anode, and electrolyte. Here, reduction takes place at the cathode, oxidation takes place at the anode, and the electrolyte act as a medium for the exchange of ions between the two electrodes.

Explanation of Solution

In order to remove the gold from a gold-plated object, the positive electrode of the power source is connected to the gold object and the negative electrode is connected to another metal. Here, the gold object acts as an anode, and oxidation of gold takes place. Due to the oxidation of gold from the gold-plated object, gold gets removed from it.