Chapter 19, Problem 45QP

Interpretation Introduction

Interpretation:

The cost of electricity for preparing 1 ton $\text{Na}$ and 1 ton $\text{Al}$ is to be compared.

Concept introduction:

Electrolysis is the process in which a reaction takes place at electrodes. The electrode that is charged positively is called the anode. The electrode that is charged negatively is called the cathode. During electrolysis, reduction takes place at the cathode and oxidation takes place at the anode.

The moles of elements are calculated by the equation:

$n_{{\text{Na}}^{+}}\text{=}\frac{\text{Given mass}}{\text{Atomic mass}}$

The moles of electrons are calculated as

$\text{Number of moles of electrons}=\left(\text{number of moles }\times \frac{1\text{ mol }{e}^{-}}{1\text{ mole of element}}\right)$