Chapter 12, Problem 12.120QP

Interpretation Introduction

Interpretation:

Of the three terms which are used to express the concentration – molality, molarity, mass percentage, the one which varies with temperature has to be identified and the same has to be justified by reasonable explanation.

Concept Introduction:

Molality is one of the parameters used to express concentration of a solution.  It is expressed as,

$\text{Molality = }\frac{number\text{ of }molesof\text{ solute}}{mass\text{ of solvent in kg}}$

Molarity is one of the parameters used to express concentration of a solution.  It is expressed as,

$\text{Molarity = }\frac{number\text{ of }molesof\text{ solute}}{volume\text{ of solution in L}}$

Mass percent is one of the parameters used to express concentration of a solution.  It is expressed as,

$\text{Mass percent of a solute = }\frac{mass\text{ of solute}}{mass\text{ of solution}}\times \text{ 100\%}$