# What is the substance that forms hydronium ions in water (Arrhenius)?

Jun 6, 2017

Substances which form hydronium ions (${H}_{3} {O}^{+}$) in water are known as Arrhenius Acids.

#### Explanation:

According to Arrhenius' concept of acids, an acid is such a compound which when dissolved in water, releases proton(s) or ${H}^{+}$.

Now as an Arrhenius acid releases ${H}^{+}$, the proton combines with a ${H}_{2} O$ molecule to produce a ${H}_{3} {O}^{+}$ ion which is an hydronium ion.

Examples of Arrhenius Acids -

$H C l , {H}_{2} S {O}_{4} , H N {O}_{3} , H B r , H I , H C l {O}_{4}$