The complete and balanced chemical equation for the reaction between hydrochloric acid (HCl) and potassium hydroxide (KOH) is:
HCl (aq) + KOH (aq) → KCl (aq) + H2O (l)
In this reaction, hydrochloric acid reacts with potassium hydroxide to produce potassium chloride (KCl) and water (H2O). This is a typical acid-base neutralization reaction where the hydrogen ion (H+) from the acid and the hydroxide ion (OH–) from the base combine to form water. The remaining potassium ion (K+) and chloride ion (Cl–) remain in solution as potassium chloride.