# Which is an Arrhenius Acid?

## ${H}_{2} S {O}_{4}$ $L i O H$ $N {H}_{2} C {H}_{3}$ $C {H}_{3} C {H}_{3}$

Aug 27, 2016

${H}_{2} S {O}_{4}$

#### Explanation:

Sulfuric acid (${H}_{2} S {O}_{4}$) is an Arrhenius acid because it has the ability to donate one of its hydrogen ions
(${H}^{+}$).

By definition an Arrhenius acid is any substance that generates hydrogen ions in aqueous solution.

Here's an example of a general Arrhenius acid:

• $H A$ is an acid because it dissociates in water to produce hydrogen ions ${H}^{+}$ and the base ${A}^{-}$.

However, LiOH is not an Arrhenius acid because it is a strong base and it dissociates almost completely in solution; it has the ability to produce hydroxide ions in solution:
$\textcolor{w h i t e}{a a a a a a a a a} L i O H \rightarrow L {i}^{+} + O {H}^{-}$

• $C {H}_{3} N {H}_{2}$ (methylamine) is a base and it cannot give off hydrogen ions.

• $C {H}_{3} C {H}_{3}$ (ethane) is a gaseous hydrocarbon and it will not give off hydrogen ions.