Question

Which salt removes hardness of water?​

Answer 1

Answer:

Water can be chemically softened on a large scale by the addition of just enough lime to precipitate the calcium as carbonate and the magnesium as hydroxide, whereupon sodium carbonate is added to remove the remaining calcium salts. Ion exchange is a common industrial method of water softening.

Explanation:

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Answer 2

ANSWER
The process of removing the dissolved magnesium and calcium salts causing hardness in water is called softening. For softening, chemicals such as sodium carbonate (Na2CO3)
slaked lime (Ca(OH)2)
etc can be used. Also, sodium chloride (NaCl) can be used to soften hard water


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