Chapter 19, Problem 119SAE

Interpretation Introduction

Interpretation:

The volume of H₂(g) at STP from H+ at a cathode that produced by a quantity of electric charge that will deposit 4.5 g Al at a cathode should be determined.

Concept introduction:

The quantity of electric charge associated with 1 mole of electrons is given by Faraday constant

$1{\text{ mol e}}^{-}\text{ = 96485 C}$

Electric charge is not measured directly, but electric current is measured. 1 A of electric current is the transfer of 1 C of charge per second (C/s).

$\text{Charge (C) = Current (C/s) }\times \text{ time (s)}$