Chapter 19, Problem 55GQ

Magnesium metal is oxidized, and silver ions are reduced in a voltaic cell using Mg²⁺(aq, 1 M) | Mg and Ag⁺(aq, 1 M) | Ag half-cells.

1. (a) Label each part of the cell
2. (b) Write equations for the half-reactions occurring at the anode and the cathode, and write an equation for the net reaction in the cell
3. (c) Trace the movement of electrons in the external circuit. Assuming the salt bridge contains NaNO₃ trace the movement of the Na⁺ and NO₃⁻ ions in the salt bridge that occurs when a voltaic cell produces current. Why is a salt bridge required in a cell?