Chapter 14, Problem 25PE

(a)

Interpretation Introduction

Interpretation:

Mass percent of glycerin in hand lotion has to be determined.

Concept Introduction:

Mass percent is concentration term used to determine concentration of solution in terms of solute percent in particular mass of solution. Expression for mass percent is as follows:

  $\text{Mass percent}=\left(\frac{\text{Mass of solute}}{\text{Mass of solution}}\right)\left(100\right)$

(b)

Interpretation Introduction

Interpretation:

Molarity of glycerin in hand lotion has to be determined.

Concept Introduction:

Molarity is amount of solute per $1\text{ L}$ of solution. Formula for molarity is as follows:

  $\text{Molarity of solution}=\frac{\text{Moles of solute}}{\text{Volume }\left(\text{L}\right)\text{ of solution}}$        (3)