Question

When permanent hard water is treated with a calculated quantity of slaked lime, what chemical reaction occurs?

a) Precipitation of calcium sulfate
b) Formation of sodium chloride
c) Production of carbon dioxide gas
d) Neutralization to form water

Answer 1

The chemical reaction that occurs when permanent hard water is treated with slaked lime is the precipitation of calcium sulfate (CaSO4).

Step-by-step explanation:

When permanent hard water is treated with a calculated quantity of slaked lime, the chemical reaction that occurs is the precipitation of calcium sulfate (CaSO4).