What is the increasing order of hydration ent | vedclass

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(A) The hydration enthalpy of ions depends on their ionic size. Smaller ions have higher charge density and thus higher hydration enthalpy. The ionic

Vedclass · Accepted Answer

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

Vedclass · Answer

(A) The hydration enthalpy of ions depends on their ionic size. Smaller ions have higher charge density and thus higher hydration enthalpy. The ionic size of alkali metal ions increases down the group as $Li^{+} < Na^{+} < K^{+} < Rb^{+} < Cs^{+}$. Therefore, the hydration enthalpy decreases as the size increases. The correct increasing order of hydration enthalpies is $Cs^{+} < Rb^{+} < K^{+} < Na^{+} < Li^{+}$.

List-$I$	List-$II$
$A$. Slaked lime	$I$. $NaOH$
$B$. Dead burnt plaster	$II$. $Ca(OH)_2$
$C$. Caustic soda	$III$. $Na_2CO_3 \cdot 10H_2O$
$D$. Washing soda	$IV$. $CaSO_4$

What is the increasing order of hydration enthalpies of alkali metal ions?

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Match List-$I$ with List-$II$:

List-$I$ List-$II$

$A$. Slaked lime $I$. $NaOH$

$B$. Dead burnt plaster $II$. $Ca(OH)_2$

$C$. Caustic soda $III$. $Na_2CO_3 \cdot 10H_2O$

$D$. Washing soda $IV$. $CaSO_4$

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