The number of mole of electron that must pass through an electrolytic cell for silver plating in order to plate 3 moles of Ag is 3 moles of electrons
We'll begin by writing the balanced equation for the reaction to determine how many mole of electron will yield 1 mole of Ag.
Ag⁺ + e —> Ag
From the balanced equation above,
1 mole of Ag required 1 mole of electron.
From the balanced equation above,
1 mole of Ag required 1 mole of electron.
Therefore,
3 moles of Ag will also require 3 moles of electrons
Thus, 3 moles of electrons is needed to yield 3 moles of Ag
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