Chapter 17, Problem 68E

Interpretation Introduction

Interpretation:

The set up of a concentration cell is given whose right compartment undergoes a change of concentration of ${\text{Fe}}^{2+}$ ions from $0.1\text{M}$ to $1\times {10}^{-7}\text{M}$. The direction of electron flow and the anode and cathode compartments is to be stated.

Concept introduction:

When the transport of substance occurs from one half cell to another due to difference in concentration gradient there occurs generation of current. This leads to the formation of concentration cells.

They are of two types,

• Electrode concentration cell
• Electrolyte concentration cell

The difference in ion concentration in different compartments decides the direction of electron flow and helps in assigning the position of anode and cathode.

To determine: The direction of electron flow and the anode and cathode compartments.