What is hydrochloric acid + potassium hydroxide?
A hydroxide refers to the OH- polyatomic ion and is formed when an oxygen makes a covalent bond with one hydrogen (however you would not see such ions free in nature as they would more probably be in compounds). Potassium hydroxide (KOH) is formed when Potassium forms ionic bonds with OH- ions while Potassium Oxide (K2O) is formed when potassium forms ionic bonds with the Oxide (O2-) ions. Hydrochloric acid + Potassium Hydroxide —> Potassium Chloride + Water i.e. HCl(aq) + KOH (aq) —-> KCl (aq) + H2O (l) This reaction is a neutralization reaction and occurs when an acid (HCl) reacts with a base (KOH).