(a) Name a sodium compound used for softening hard water.

(b) Which compound of calcium is used for disinfecting the drinking water supply?

(c) Name a metal compound that has detergent properties (cleansing properties).

Answer:

(a) To soften hard water, sodium carbonate is utilized. Washing soda is the common name for this substance.

(b) Bleaching powder is a calcium compound used in the disinfection of drinking water.

(c) Sodium carbonate is a metal compound with cleaning and detergent properties.