Chapter 12, Problem 12.70SP

Interpretation Introduction

Interpretation:

The concentration of ozone in parts per million (ppm) should be determined.

Concept introduction:

The concentration of any solution is mean the amount of solute present in the specific volume of the solvent. Now the amount of solute present in solution is expressed by different units like: gram, gram-equivalent, gram-mole or mole etc. The amount of solvent to prepare the solution can be expressed in terms of weight or volume. The different unit of expression the concentration of a solution are- percentage strength, normality, molarity, molality, formality, gram per litter, mole fraction, parts per million etc.

Given:

The average total pressure of ozone layer on earth’s stratosphere is 10 mm Hg ( $\text{1}\text{.3}\times {\text{10}}^{-2}$ atm).
The partial pressure of ozone in the layer is about $\text{1}\text{.2}\times {\text{10}}^{-6}$ mm Hg ( $\text{1}\text{.6}\times {\text{10}}^{-9}$ atm).
The average molar mass of air is 29 g/mole.