what is hydration enthalpies ?

Asked by suvrat sharma | 2nd Feb, 2011, 12:00: AM

Expert Answer:

Dear Student
 
Enthalpy of hydration o

f an ion is the amount of energy released when a mole of the ion dissolves in a large amount of water forming an infinite dilute solution in the process,

Mz+(g) + mH2O -------> Mz+(aq)

where Mz+(aq) represents ions surrounded by water molecules and dispersed in the solution. The approximate hydration energies of some typical ions are listed here. The table illustrates the point that as the atomic numbers increases, so do the ionic size, leading to a decrease in absolute values of enthalpy of hydration.

 

We hope that clarifies your query.
Regards
Team
Topperlearning

Answered by  | 2nd Feb, 2011, 06:23: PM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.