Chapter 13.3, Problem 2PPC

Interpretation Introduction

Interpretation:

Which graph depicts the relationship between percent by mass and molality of the solute to be predicted.

Figure.1

Concept introduction:

• Molality (m): Molality is the number of moles of solute present in one kilogram of solvent. Molality is estimation of moles in relationship with solvent in the solution.

$\text{Molality (m) =}\frac{\text{Number}\text{of}\text{moles}\text{of}\text{solute}}{\text{1kg}\text{of}\text{solvent}}$

• Percent by mass: Mass percent is mass of the element is divided by total mass of the compound and multiplied by 100.

$\text{Percent mass =}\frac{\text{Mass}\text{of}\text{the}\text{element}}{\text{total}\text{mass}\text{of}\text{the}\text{compound}}\text{×100\%}$