Engineering
Chemistry
Alkali Metals and Properties
Hydration and Lattice Energy
Question

The correct order of hydration enthalpies of alkali metal ions is

Na+ > Li+ > K+ > Cs+ > Rb+

Li+ > Na+ > K+ > Cs+ > Rb+

Na+ > Li+ > K+ > Rb+ > Cs+

Li+ > Na+ > K+ > Rb+ > Cs+

JEE Advance
College PredictorLive

Know your College Admission Chances Based on your Rank/Percentile, Category and Home State.

Get your JEE Main Personalised Report with Top Predicted Colleges in JoSA

Solution

Hydration enthalpy depends upon ionic potential (charge/size). As ionic potential increases hydration enthalpy increases.

ΔhydH0αqr