The salt formed is calcium chloride , with the formula CaCl₂.

Quick Scoop

When hydrochloric acid (HCl) reacts with calcium hydroxide (Ca(OH)₂), it’s an acid–base neutralisation reaction. The hydrogen ions from HCl combine with hydroxide ions from Ca(OH)₂ to form water, and the remaining calcium and chloride ions form the salt calcium chloride.

Balanced equation:

Ca(OH)2+2HCl→CaCl2+2H2O\text{Ca(OH)}_2+2\text{HCl}\rightarrow \text{CaCl}_2+2\text{H}_2\text{O}Ca(OH)2​+2HCl→CaCl2​+2H2​O

So, if someone asks “which salt would form if you reacted hydrochloric acid with calcium hydroxide?”, the answer is: calcium chloride (CaCl₂).

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