# For each molecule of sulfuric acid, how many hydrogen ions are released in water?

Apr 6, 2017

Usually 2..........

#### Explanation:

The conjugate base of sulfuric, ${H}_{2} S {O}_{4}$, is bisulfate, $H S {O}_{4}^{-}$, which is itself a reasonably strong acid. In aqueous solution, the given equilibrium lies to the right:

${H}_{2} S {O}_{4} \left(a q\right) + 2 {H}_{2} O \left(l\right) r i g h t \le f t h a r p \infty n s 2 {H}_{3} {O}^{+} + S {O}_{4}^{2 -}$

As chemists, as physical scientists, we should seek out some quantitative data:

this site quotes pK_(a_1)=-3.0;pK_(a2)=1.99.