Write the decreasing order of hydration entha | vedclass

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Question

(A) The hydration enthalpy of alkali metal ions is inversely proportional to their ionic radius. As the ionic radius increases down the group,the char

Vedclass · Accepted Answer

$Li^{+} > Na^{+} > K^{+} > Rb^{+} > Cs^{+}$

Vedclass · Answer

(A) The hydration enthalpy of alkali metal ions is inversely proportional to their ionic radius. As the ionic radius increases down the group,the charge density decreases,leading to a decrease in hydration enthalpy. Since $Li^{+}$ has the smallest ionic radius,it has the highest hydration enthalpy,and $Cs^{+}$ has the largest ionic radius,resulting in the lowest hydration enthalpy. The correct decreasing order is: $Li^{+} > Na^{+} > K^{+} > Rb^{+} > Cs^{+}$.

Write the decreasing order of hydration enthalpy of alkali metal ions.

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