The simplest type of acid-base reaction is a proton transfer reaction. In this type of reaction, an acid donates a proton (H+) to a base. The general form for this type of reaction is:

HA + B → A- + HB+

where:

* HA is the acid

* B is the base

* A- is the conjugate base of the acid

* HB+ is the conjugate acid of the base

This type of reaction is also known as a neutralization reaction.