Chapter 13.5, Problem 13.4BFP

Interpretation Introduction

Interpretation: The mass of solvent diethyl ether should be calculated that is required to prepare the $\text{0}\text{.607 m}$ solution with $\text{15}\text{.20 g}$ of solute ${\text{I}}_{\text{2}}$ .

Concept Introduction: Mole concept is used to calculate the moles, mass, number of atoms, and moles of a compound. The relation between these values can be shown as:

  $\begin{array}{l}\text{Moles = }\frac{\text{mass}}{\text{molar mass}}\\ {\text{1 mole = N}}_{\text{a}}\text{ atoms}\\ {\text{N}}_{\text{a}}\text{ = 6}\text{.022 }\times {\text{ 10}}^{\text{23}}\end{array}$

Molality is the way to express the concentration of solutions as given below:

  $\text{Molality = }\frac{\text{moles }}{\text{mass of solvent(kg)}}$