Chapter 11, Problem 7CE

Interpretation Introduction

Interpretation:

The systematic names for the following hydrates: ${\text{CaCl}}_{\text{2}}\cdot {\text{H}}_{\text{2}}\text{O}$, ${\text{CaCl}}_{\text{2}}\cdot 2{\text{H}}_{\text{2}}\text{O}$, and ${\text{CaCl}}_{\text{2}}\cdot 6{\text{H}}_{\text{2}}\text{O}$ are to be stated.

Concept introduction:

A hydrate can be defined as the substance that contains a fixed number of water molecules in its crystal structure. For example: copper sulfate pentahydrate $\left({\text{CuSO}}_{\text{4}}\cdot 5{\text{H}}_{\text{2}}\text{O}\right)$ or copper sulfate heptahydrate $\left({\text{CuSO}}_{\text{4}}\cdot {\text{7H}}_{\text{2}}\text{O}\right)$. The water units attached in the hydrates is known as water of hydration. The water of hydration in ${\text{CuSO}}_{\text{4}}\cdot {\text{7H}}_{\text{2}}\text{O}$ is 7 as it contains seven water units.