JEE Mains · Chemistry · STD 11 - 4. Chemical bonding and molecular structure
The correct order of hydration enthalpies of alkali metal ions is
- A \(Li^+ > Na^+ > K^+ > Cs^+ > Rb^+\)
- B \(Na^+> Li^+ > K^+ > Rb^+ > Cs^+\)
- C \(Na^+ > Li^+ > K^+ > Cs^+ > Rb^+\)
- D \(Li^+ > Na^+ > K^+ > Rb^+ > Cs^+\)
Answer & Solution
Correct Answer
(D) \(Li^+ > Na^+ > K^+ > Rb^+ > Cs^+\)
Step-by-step Solution
Detailed explanation
Hydration enthalpy depends upon ionic potential (charge/size). As ionic potential increases hydration enthalpy increases \({\Delta _{hyd}}{H^o} \propto \frac{q}{r}\)
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