Solution:
Option (iii) is the answer.
Water softening is done with sodium hexametaphosphate (Calgon). Calgon interacts with calcium/magnesium salts in hard water to create inactive complex anions that do not precipitate.
Solution:
Option (iii) is the answer.
Water softening is done with sodium hexametaphosphate (Calgon). Calgon interacts with calcium/magnesium salts in hard water to create inactive complex anions that do not precipitate.