# What are the similarities and differences between acids and bases?

Jul 19, 2018

For a given solvent, water, ammonia, hydrogen fluoride, sulfuric acid....

#### Explanation:

The acid is the characteristic CATION, and the base is the characteristic ANION...and typically their concentrations obey an equilibrium expression...for example, water...

$2 {H}_{2} O \left(l\right) r i g h t \le f t h a r p \infty n s {H}_{3} {O}^{+} + H {O}^{-}$

...${K}_{w} = \left[{H}_{3} {O}^{+}\right] \left[H {O}^{-}\right] = {10}^{-} 14$.

For liquid ammonia...

$2 N {H}_{3} r i g h t \le f t h a r p \infty n s N {H}_{4}^{+} + N {H}_{2}^{-}$

${K}_{\text{ammonlysis}} = \left[N {H}_{4}^{+}\right] \left[N {H}_{2}^{-}\right] = {10}^{-} 31$.