Question

Which of the following will cause softening of hard water
(A) Passing it through cation exchange resin.
(B) Passing it through anion exchange resin.
(C) Passing it through sand.
(D) Passing it through alumina.

Answer 1

Hint: Unlike hard water, softened water won't form precipitate in pipes and tanks or intrude with cleansers similar to cleaner. Water softening is therefore necessary in numerous diligence, and small water- softening units are used in homes in a number of countries.

Complete Step by Step Solution:
Water softening is the removal of calcium, magnesium, and certain other essence cations in hard water. The performing soft water requires a lower cleaner for the same cleaning trouble, as cleaner isn't wasted relating with calcium ions. Water softening is generally achieved using lime softening or ion- exchange resins but is decreasingly being fulfilled using Nano filtration or rear osmosis membranes.

Hard water can be problematic because the calcium and magnesium ions reply with the advanced adipose acids of cleaner to form an undoable glutinous curd, thereby causing a waste of the cleaner. Because of the metal ions present in the water which are duly responsible for the hardness of water cation exchangers are used in order to soften the water and resolve the problems arising from it.

Hence, the correct answer is option (A).

Note: The presence of certain ions like calcium and magnesium, star as bicarbonates, chlorides, and sulphates, in water causes a variety of problems. Hard water leads to the buildup of lime scale, which can foul plumbing, and promote galvanic erosion. In artificial scale water softening shops, the effluent inflow from there-generation process can precipitate scale that can intrude with sewage systems