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Universal Solvent

Can any other...

Question

Can any other salts of magnesium andcalcium except their carbonates used for making water hard

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Solution

1. The bicarbonates, sulphates and chlorides of magnesium and calcium also make water hard.
The salts are CaHCO₃ and MgHCO₃ (bicarbonates), CaCl₂ and MgCl₂ (chlorides) and CaSO₄ and MgSO₄ (sulphates).

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Except carbonates and bicarbonates for all other oxo salts solubility in water increases down the group for alkali metals . Explain.

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