Question

why do we add CO2 at final stage of lime softening​

Answer 1

Answer:

please mark brainliest answer ok

Explanation:

When high magnesium water is softened, excess lime needs to be added to raise the pH above 11, and magnesium hydroxide precipitates out. After treatment, enough carbon dioxide must be added to neutralize the excess hydroxide ions, as well as convert carbonate ions to bicarbonate ions.

Answer 2

Answer:

nothing else there......