Chapter 16, Problem 6PE

Interpretation Introduction

Interpretation:

The molality of solution when it is prepared by dissolving $\text{80}\text{.0}\text{mg}$ of potassium phosphate in $\text{25}\text{mL}$ of water is to be calculated.

Concept introduction:

Molality is defined as the measure of concentration of moles of solute in a solution. It is calculated by dividing the number of moles of solute by the weight of solvent in $\text{Kg}$. This can be expressed mathematically as shown below.

$\text{M}=\frac{\text{n}}{\text{V}}$

Where,

• $\text{M}$ is the molarity.

• $\text{n}$ is the number of moles of solute.

• $\text{V}$ is the volume of solution in liters.