Q.
Ionization energy of Al = 5137 kJ mol-1 (∆H) hydration of Al3+ = - 4665 kJ mol-1. (∆H)hydration for Cl-=-381 kJ mol-1. Which of the following statement is correct.
see full answer
Start JEE / NEET / Foundation preparation at rupees 99/day !!
21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!
An Intiative by Sri Chaitanya
a
AlCl3 would remain covalent in aqueous solution
b
Only at infinite dilution AICl3 undergoes ionization
c
In aqueous solution AlCl3 becomes ionic
d
None of these
answer is C.
(Unlock A.I Detailed Solution for FREE)
Ready to Test Your Skills?
Check your Performance Today with our Free Mock Test used by Toppers!
Take Free Test
Detailed Solution
If AlCl3 is present in ionic state in aqueous solution, therefore it has Al3+ and 3Cl- ions Standard heat of hydration of A13+ and 3Cl- ions = - 4665 + 3× (-381) kJ mol-1= -5808 kJ/molRequired energy of ionization of Al = 5 137 kJ mol-1 ..'. Hydration energy overcomes ionization energy .'. AlCl3 would be ionic in aqueous solution
Watch 3-min video & get full concept clarity