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which of the ...

Question

which of the following does not cause hardness of water?- MgCl2, MgSo4, Ms(HCO3)2, MgCO3

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Solution

All the four salts cause hardness. MgCl₂ and MgSO₄cause permanent hardness of water, while Mg(HCO₃)₂ and MgCO₃ cause temporary hardness of water.

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Q. Which of these is a salt that does not cause hardness in water
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(b) Ca(HCO₃)₂
(c) CaSO₄
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II) the hardness of water caused by

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Q. Which of the following substances cause permanent hardness of water?

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