Answer
a. acidity of a solution
b. $\mathrm{p}\mathrm{H}=-\log[\mathrm{H}^{+}]$
Work Step by Step
The pH scale is decribed on page 381.
$a.$
The $\mathrm{p}\mathrm{H}$ scale measures the acidity of a solution
$b.$
$\mathrm{p}\mathrm{H}=-\log[\mathrm{H}^{+}]$
$[\mathrm{H}^{+}]$ is measured in moles per liter (M).
