Which of the following has the highest enthal | vedclass

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(A) The enthalpy of hydration is inversely proportional to the size of the ion and directly proportional to the charge density. For alkaline earth met

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$MgCl_2$

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(A) The enthalpy of hydration is inversely proportional to the size of the ion and directly proportional to the charge density. For alkaline earth metal ions,the size increases down the group $(Be^{2+} Therefore,the enthalpy of hydration decreases down the group. Among the given options,$Mg^{2+}$ has the smallest ionic radius,resulting in the highest charge density and the highest enthalpy of hydration.

Which of the following has the highest enthalpy of hydration?

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