# Acid ionization reaction

An acid ionization reaction is a reaction in which an H+ separates from the acid molecule so that it can be donated in another reaction.[1] The chemical equation for a general acid ionization reaction is as follows:

$HA \rightleftharpoons H^+ + A^-$

Technically, H+ doesn't exist in water, it combines with water to form H3O+. Thus, a more accurate general equation would be:

$HA + H_2O \rightleftharpoons H_3O^+ + A^-$

In most uses, however, the first form of the equation is used, for simplicity.

## References

1. Wile, Dr. Jay L. Exploring Creation With Chemistry. Apologia Educational Ministries, Inc. 1998