# How does a base differ from an acid?

##### 1 Answer
Apr 25, 2016

According to the pH scale, acidic substance has a pH range from 0 (strong acid) to 6.9 (weak acid). However, basic substances has a pH range from 7.1 (weak base) to 14 (strong base).

During a chemical reaction, acidic substances will release ${H}^{+}$(hydrogen) ions. However, basic substances will release $O {H}^{-}$ (hydroxide) ions.