The balanced equation for the reaction between hydrochloric acid (HCl) and potassium hydroxide (KOH) is:

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HCl + KOH → KCl + H2O

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In this reaction, one molecule of hydrochloric acid reacts with one molecule of potassium hydroxide to produce one molecule of potassium chloride (KCl) and one molecule of water (H2O). The reaction is a neutralization reaction, where the acid (HCl) and the base (KOH) react to form a salt (KCl) and water.