Chapter 9, Problem 1RQ

Interpretation Introduction

Interpretation:

The definition of mole ratio has to be given.

Explanation of Solution

Mole ratio:

A mole ratio is a ratio between the numbers of moles of any two species involved in a chemical reaction.

Example:

Consider the reaction,

  ${\text{2KClO}}_{\text{3}}\stackrel{}{\to }{\text{2KCl+3O}}_{\text{2}}$

The desired product in the reaction is Potassium Chloride.  The moles of $\text{KCl}$ belong to the numerator of the mole ratio.  The starting substances are ${\text{KClO}}_{\text{3}}\text{.}$  The moles of ${\text{KClO}}_{\text{3}}$ then belong to the denominator of the mole ratio.

In the mole ration the coefficients of the balanced equation are used.  Therefore the mole ratio is $\frac{\text{2}\text{mol}\text{KCl}}{\text{2}\text{mol}{\text{KClO}}_{\text{3}}}\text{.}$