Chapter 11.3, Problem 11.7P

Interpretation Introduction

Interpretation:

The mass of solution needed has to be calculated.

Concept introduction:

Concentration can be defined in terms of molality (m) as the number of moles of solute per kilogram of solvent. It can be given by the expression,

$\text{Molality}\text{(m)}\text{=}\frac{\text{Moles}\text{of}\text{solute}\text{(g/mole)}}{\text{Mass}\text{of}\text{solvent}\text{(Kg)}}$

Mole fraction of a compound can be defined as the number of moles of a substance to the total number of moles present in them. The mole fraction can be calculated by,

$\text{Mole}\text{fraction}\text{of}\text{compound=}\frac{\text{Number}\text{of}\text{moles(in}\text{mol)}}{\text{Total}\text{number}\text{of}\text{moles(in}\text{mol)}}$