Which of the following compounds has a lattic | vedclass

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Question

(A) The solubility of alkaline earth metal sulfates decreases down the group from $Be$ to $Ba$. This is because the hydration enthalpy decreases more

Vedclass · Accepted Answer

$MgSO_4$

Vedclass · Answer

(A) The solubility of alkaline earth metal sulfates decreases down the group from $Be$ to $Ba$. This is because the hydration enthalpy decreases more rapidly than the lattice enthalpy as the size of the cation increases. For a compound to be highly soluble,its hydration enthalpy must be greater than its lattice enthalpy. Among the given options,$MgSO_4$ has a relatively small cation $(Mg^{2+})$,which results in a high hydration enthalpy that outweighs the lattice enthalpy,making it the most soluble compound in the list.

Which of the following compounds has a lattice enthalpy lower than its hydration enthalpy?

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