Chapter 17, Problem 19E

Interpretation Introduction

Interpretation: The mass percent, molality and mole fraction of the citric acid needs to be determined.

Concept introduction: To calculate mass percent of component A of a solution having two components A and B, use the formula given below.

  $\text{Mass}\text{percent=}\frac{\text{Mass}\text{of}\text{A}}{\text{Mass}\text{of}\text{A}+\text{Mass}\text{of}\text{B}}\times 100\%$

To calculate mole fraction of component A of a solution having two components A and B use the formula given below.

  $\text{Mole}\text{fraction}\text{of A=}\frac{\text{Moles}\text{of}\text{A}}{\text{Moles}\text{of}\text{A}+\text{Moles}\text{of}\text{B}}$

To calculate moles use the below formula.

  $\text{Number}\text{of}\text{moles=}\frac{\text{Mass}}{\text{Molar}\text{mass}}$

To calculate molality, use the below formula.

  $\text{Molality=}\frac{\text{Moles}\text{of}\text{solute}}{\text{Mass}\text{of}\text{solvent}\text{in}\text{kg}}$