The Chemical Reaction Between Calcium Hydroxide and Hydrochloric Acid

Consider the word equation.

Calcium hydroxide + hydrochloric acid → calcium chloride + water

Which is the corresponding formula equation?

Ca(OH)2(s) + 2HCl(l) → CaCl2(aq) + 2H2O(l)

Answer

Ca(OH)2 (s) + 2HCl (aq) = CaCl2 (aq)+ 2H2O (l)

Explanation

Calcium hydroxide is a fairly strong base, and hydrochloric acid is a strong acid. The two substances readily react with and neutralize each other, forming the soluble salt calcium chloride (CaCl2) and water. This reaction is called neutralization.

In this reaction, one mole of calcium hydroxide reacts with 2 moles of hydrochloric acid to produce one mole of calcium chloride and 2 moles of water.

The calcium hydroxide and hydrochloric acid break down to form ions.

• Ca(OH)2 → Ca2+ + 2OH-
• HCl → H+ + Cl-

So there occurs the ion exchange method and the overall chemical equation is as follows.

Ca(OH)2 + 2HCl → CaCl2 + 2H2O

Do you understand the chemical reaction between calcium hydroxide and hydrochloric acid?

Answer:

Yes, the reaction between calcium hydroxide and hydrochloric acid results in the formation of calcium chloride and water through neutralization.