Chapter 13, Problem 22PE

Interpretation Introduction

Interpretation:

Mass percent of water in gypsum $\left({\text{CaSO}}_{\text{4}}\cdot {\text{2H}}_{\text{2}}\text{O}\right)$ has to be calculated.

Concept Introduction:

Mass percent is one of the most commonly used concentration terms to determine concentration of any species. The expression for mass percent of any species present in sample is as follows:

  $\text{Mass percent}=\left(\frac{\text{Mass of species}}{\text{Mass of sample}}\right)\left(100\text{ \%}\right)$