# Question #2c872

Acids react to form ${H}^{+}$ ions in solution, whereas bases form $O {H}^{-}$ ions. The two combine to form water molecules.
Acids are usually denoted with an H atom before the rest of the molecule (ex. acetic acid, $H {C}_{2} {H}_{3} {O}_{2}$) and give off ${H}^{+}$ ions. Bases are similar, but instead give of $O {H}^{-}$ ions in solution (ex Potassium hydroxide, $K O H$). When ${H}^{+}$ ions and $O {H}^{-}$ ions react, they typically form water, following this simple reaction:
${H}^{+}$ + $O {H}^{-}$ --> ${H}_{2} O$.