Answer:
Add a base
Explanation:
Two of the acids that may cause high pool acidity are hydrochloric acid (HCl) and hypochlorous acid (HOCl).
To reduce the acidity in the pool, they must add a base to neutralize the excess acid.
A commonly used base is sodium carbonate — Na₂CO₃ or washing soda. The equations for the reactions are:
Na₂CO₃(aq) + 2HCl(aq) ⟶ 2NaCl(aq) + H₂CO₃(aq)
Na₂CO₃ (aq) + 2HOCl(aq) ⟶ 2NaOCl(aq) + H₂CO₃(aq)
The initially formed carbonic acid will decompose into carbon dioxide and water.
H₂CO₃(aq) ⇌ CO₂(aq) + H₂O(ℓ)
