Chapter 22, Problem 22.58SP

Interpretation Introduction

(a)

Interpretation:

Whether the hydrogen present as ${\text{H}}^{+},{\text{ H}}^{-}$ or a covalently bonded $\text{H}$ in ${\text{MgH}}_2$ should be determined.

Concept introduction:

The location of each element in the periodic table determines the formula of the hydride it forms. Alkali metals form ionic hydrides and have the formula $\text{AH}$. Transition elements form interstitial hydrides and have no definite stoichiometric formula, ${\text{AH}}_x$. Covalent hydrides are formed by nonmetals and the formula depends on their group in the periodic table.

Interpretation Introduction

(b)

Interpretation:

Whether the hydrogen present as ${\text{H}}^{+},{\text{ H}}^{-}$ or a covalently bonded $\text{H}$ in ${\text{PH}}_3$ should be determined.

Concept introduction:

The location of each element in the periodic table determines the formula of the hydride it forms. Alkali metals form ionic hydrides and have the formula $\text{AH}$. Transition elements form interstitial hydrides and have no definite stoichiometric formula, ${\text{AH}}_x$. Covalent hydrides are formed by nonmetals and the formula depends on their group in the periodic table.

Interpretation Introduction

(c)

Interpretation:

Whether the hydrogen present as ${\text{H}}^{+},{\text{ H}}^{-}$ or a covalently bonded $\text{H}$ in $\text{KH}$ should be determined.

Concept introduction:

The location of each element in the periodic table determines the formula of the hydride it forms. Alkali metals form ionic hydrides and have the formula $\text{AH}$. Transition elements form interstitial hydrides and have no definite stoichiometric formula, ${\text{AH}}_x$. Covalent hydrides are formed by nonmetals and the formula depends on their group in the periodic table.

Interpretation Introduction

(d)

Interpretation:

Whether the hydrogen present as ${\text{H}}^{+},{\text{ H}}^{-}$ or a covalently bonded $\text{H}$ in $\text{HBr}$ should be determined.

Concept introduction:

The location of each element in the periodic table determines the formula of the hydride it forms. Alkali metals form ionic hydrides and have the formula $\text{AH}$. Transition elements form interstitial hydrides and have no definite stoichiometric formula, ${\text{AH}}_x$. Covalent hydrides are formed by nonmetals and the formula depends on their group in the periodic table.