Which are produced when HCl reacts with Ca(OH)2?

This is an acid–base neutralization: hydrochloric acid reacts with calcium hydroxide to form a salt and water. The salt is calcium chloride, CaCl₂, because calcium forms Ca²⁺ and chloride forms Cl⁻. The balanced equation is 2HCl + Ca(OH)₂ → CaCl₂ + 2H₂O, so the products are calcium chloride and water.

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