Chapter 18, Problem 18.19A

Interpretation Introduction

Interpretation:

The Zn+2:Cu+2 concentration ratio should be measured at 25⁰C temperature if the cell potential is 1.16V.

Concept introduction:

The galvanic or voltaic cells are the types of electrochemical cells that produces electricity by using the electron transfer through a redox reaction method.
The cell potential and concentration for the galvanic cells can be determined by using Nernst’s equation which is given as follows:

$E=E^0-\frac{R\times T}{n\times F}\ln Q$

Where, Q is reaction quotient and known as the ratio of product to the reactant, E is cell potential, E⁰ is standard cell potential, R is universal gas constant, F is Faraday’s constant and n is number of electrons used.

At, 298K or 25⁰C temperature, the value of R,T and F are put together to obtain a formula as:

$E=E^0-\frac{0.0592V}{n}\log Q$

Further, a formula used for the standard cell potential is:

$E_{cell}^0=E_{oxid}^0+E_{red}^0$