Chapter 16, Problem 3STP

Interpretation Introduction

Interpretation : The unit of molality is to be chosen from the given options.

Concept Introduction : Molality is the ratio of moles of solute and the mass of the solvent in kg.

Answer to Problem 3STP

Correct answer: (C) $\frac{moles}{kilogramofsolvent}$

Explanation of Solution

Reason: The molality is the measure of the concentration of the solution which is expressed by the ratio of moles of solute to the mass of solvent in kilograms.

Hence, the expression for molality can be written as:

  $\frac{molesofsolute(moles)}{massofsolvent(kilogram)}=\frac{moles}{kilogramofsolvent}$