Chapter 19, Problem 19.9QP

Interpretation Introduction

Interpretation: Faraday constant should be determined

Concept Introduction:

$\begin{array}{l}\text{The Faraday constant, F, is a physical constant }\\ \text{equal to the total electric charge carried by one mole of electrons}\text{.}\\ \text{The constant is named for English scientist Michael Faraday}\text{.}\end{array}$$\begin{array}{l}\begin{array}{l}{\text{The Faraday constant is related to Avogadro's constant N}}_{\text{A}}\\ \text{and the elementary charge of an electron e by the equation:}\end{array}\hfill \\ {\text{F = e N}}_{\text{A}}\hfill \end{array}$

The Faraday constant is the electric charge contain in 1 mole of electrons.

$\begin{array}{l}\text{The "faraday" is a unit of electrical charge that is equal to the magnitude of the charge of a mole of electrons}\text{. }\\ \text{In other words, the Faraday constant equals 1 faraday}\text{.}\end{array}$$\begin{array}{l}\text{The "f" in the unit is not capitalized, while it is when referring to the constant}\text{.}\\ \text{ The faraday is rarely used, in favor of the SI unit of charge, the coulomb}\text{.}\end{array}$

$\begin{array}{l}\text{An unrelated units is the farad }\left(\text{1 farad = 1 coulomb / 1 volt}\right)\text{,}\\ \text{ which is a unit of capacitance, also named for Michael Faraday}\end{array}$

To determine: The charge per mole of electron, multiply the charge on the electron by Avogadro’s number.