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QJEEM16Ch2a00: JEE Main 2016 Chemistry - Class 11 JEEM16Ch2a00 Solution: The correct order of the solubility of alkaline-earth metal…
The correct order of the solubility of alkaline-earth metal sulphates in water is :
Multiple Choice Options
- A Mg < Ca < Sr < Ba
- B Mg < Sr < Ca < Ba
- C Mg > Sr > Ca > Ba
- D Mg > Ca > Sr > Ba
Step-by-Step Verified Solution
The solubility of the sulphates in water decreases down the group. Mg > Ca > Sr > Ba. MgSO4 is soluble, but CaSO4 is sparingly soluble, and the sulphates of Sr, Ba and Ra are virtually insoluble. The significantly high solubility of MgSO4 is due to the high enthalpy of solvation of the smaller Mg2+ ion.