Chapter 15.10, Problem 1PPB

Practice Problem BUILD

Consider a weak acid, HA, that ionizes according to the equation:

$\text{HA}\left(aq\right)\underset{}{\rightleftarrows }{\text{ H}}^{\text{+}}\left(aq\right){\text{ + A}}^{\text{-}}\left(aq\right)$

$\text{At 25°C,}$ a 0.145-M solution of aqueous HA is found to have a hydrogen ion concentration of $2.2\times {10}^{-5}M.$ Determine the $K_c$ for this reaction at $\text{25°C}$.