Chapter 14, Problem 14.15P

(a)

Interpretation Introduction

Interpretation:

For given demonstration Nernst equation has to be written and direction of flow of electron through the circuit has to be predicted.

Figure 1

Concept introduction:

Nernst equation is,

${\text{E = E}}_{\text{o}}\text{-}\frac{0.05916}{\text{n}}\text{ln}\text{Q}$

Where,

$\begin{array}{l}{\text{E}}_{\text{o}}\text{-Standard potential of thecell}\\ \text{n - Number of electrons}\\ \text{Q - Reactant quotient}\end{array}$

(b)

Interpretation Introduction

Interpretation:

If we use our fingers as salt bride in given demonstration, whether ${\text{Cu}}^{\text{2+}}$ or ${\text{Zn}}^{2+}$ will take in our body has to be explained.