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Chemistry
The correct order of solubility of the sulphates of alkaline earth metals in water is Be > Mg > Ca > Sr > Ba. This is due to
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Q. The correct order of solubility of the sulphates of alkaline earth metals in water is $Be > Mg > Ca > Sr > Ba$. This is due to
JIPMER
JIPMER 2014
The s-Block Elements
A
decreasing lattice energy
30%
B
high heat of solvation for smaller ions like $Be^{2+}$
49%
C
increase in melting points
12%
D
increasing molecular weight
9%
Solution:
As we move down the group from $BeSO_4$ to $BaSO_4$, the enthalpy of hydration of the positive ion becomes smaller due to increase in ionic size. Salts of heavier metal ions are less soluble than those of lighter ions.