Chapter 19, Problem 94GQ

(a)

Interpretation Introduction

Interpretation:

The anode and the cathode in the experiment and the half reactions occurs at each electrode has to be determined.

Concept introduction:

Voltaic cell or Galvanic cell:

The device to produce electricity by using chemical reactions. In these divces are redox chemical reactions are occured.

A voltaic cell converts chemical energy into electrical energy.

It consists of two half cells. Each half cell consists of a metal and a solution of a salt of metal. Two half cells are connected by salt bridge.

The chemical reaction in the half cell is an oxidation reduction (redox)reactions.

For example:

Cell diagram of voltaic or galvanic cell is as follows.

$\begin{array}{l}\text{ Salt bridge}\\ \downarrow \\ {\text{Cu(s)|Cu}}^{\text{2+}}{\text{(aq) || Ag}}^{\text{+}}\text{(aq)|Ag(s)}\\ \text{\_\_\_\_\_\_\_\_\_\_\_\_ \_\_\_\_\_\_\_\_\_\_\_}\\ \downarrow \downarrow \\ \text{ Half cell Half cell}\end{array}$

(b)

Interpretation Introduction

Interpretation:

The number of kilowatt –hours $\left(kWh\right)$ of energy required to carry out the electrolysis has to be determined.

Concept introduction:

Voltaic cell or Galvanic cell:

The device to produce electricity by using chemical reactions. In these divces are redox chemical reactions are occured.

A voltaic cell converts chemical energy into electrical energy.

It consists of two half cells. Each half cell consists of a metal and a solution of a salt of metal. Two half cells are connected by salt bridge.

The chemical reaction in the half cell is an oxidation reduction (redox)reactions.

For example:

Cell diagram of voltaic or galvanic cell is as follows.

$\begin{array}{l}\text{ Salt bridge}\\ \downarrow \\ {\text{Cu(s)|Cu}}^{\text{2+}}{\text{(aq) || Ag}}^{\text{+}}\text{(aq)|Ag(s)}\\ \text{\_\_\_\_\_\_\_\_\_\_\_\_ \_\_\_\_\_\_\_\_\_\_\_}\\ \downarrow \downarrow \\ \text{ Half cell Half cell}\end{array}$