# H_2SO_4 can ionize to yield two H^+ ions an and one SO_4^-2 ion. What is #H_2SO_4 considered?

Sep 1, 2016

Sulfuric acid is considered to be a diacid.

#### Explanation:

Sulfuric acid donates 2 equiv of ${H}_{3} {O}^{+}$ to aqueous solution.

${H}_{2} S {O}_{4} + {H}_{2} O \rightarrow H S {O}_{4}^{-} + {H}_{3} {O}^{+}$

$H S {O}_{4}^{-} + {H}_{2} O \rightarrow S {O}_{4}^{2 -} + {H}_{3} {O}^{+}$

The first equilibrium lies almost quantitatively to the right. The second equilibrium is smaller, but still operates, ${K}_{a 2} = 1.2 \times {10}^{-} 2$.