Chapter 18, Problem 18.12QP

Interpretation Introduction

Interpretation: Prediction should be proposed for $I^{-}$ to $I$(II) under standard state condition from ${\text{Fe}}^{\text{3+}}$ ion.

Concept Introduction:

Standard state condition:

The electromotive force (EMF) is the maximum potential difference between two electrodes of a galvanic or voltaic cell. This quantity is related to the tendency for an element, a compound or an ion to acquire (gain) or release (loss) electrons.

Half-cell Reaction: A half-cell is one of the two electrodes in a galvanic cell or simple battery.

Example, the Zn-Cu battery, the two half cells make an oxidizing couple.

Standard state condition are defined as by standard temperature &pressure (STP) with a temperature of ${\text{0 }}^{\text{o}}\text{C}$ or $\text{ 273}\text{. Kelvin }\left(\text{K}\right)$ and a pressure of 1 atmosphere, temperature.

At STP (Standard Temperature &Pressure) 1mole of ideal gas occupied 22.4L.