Chapter 18, Problem 18.97QP

Interpretation Introduction

Interpretation:

The reason why a galvanic cell cannot give voltage above $\text{2}\text{.5V}$ has to be explained and a method has to be predicted to develop a cell which can derive voltage above $\text{5V}$

Concept Introduction:

Galvanic cell is an electrochemical device in which electrical energy is derived from a spontaneous redox reaction.  It has two half cells named anode and cathode, which are in separate containers.  Anode is having negative charge and at anode oxidation is taking place.  Cathode is having positive charge and at cathode reduction takes place.  The two half cells are connected by a salt bridge.

The standard electrode potential ${\text{(E}}^{°}{}_{\text{cell}})$ of a cell is the difference in electrode potential of the cathode and anode.

${\text{E}}^{\text{°}}{}_{\text{cell}}={\text{E}}^{\text{°}}{}_{\text{cathode}}-{\text{E}}^{\text{°}}{}_{\text{anode}}$