Question

How to Find out Hybridisation of [Cr(H2O)6]3+

Answer 1

cr =3d5,4s1     cr+3= 3d3,4s0 two vaccant  d orbital available .so, d2sp3 irrespective of any ligand.

Answer 2

Hey dear,
You can find out hybridization of compounds using molecular orbital theory.

● Answer -
[Cr(H2O)6]3+ shows d2sp3 hybridization.

● Explanation -
[Refer to the image for better understanding.]

Electronic configuration of Cr (Z=24) is [Ar] 3d5 4s1.
Cr loses 3e- to form Cr3+ with electronic configuration [Ar] 3d3 4s0.

Electrons from 6 water molecules fill two 3d, one 4s and three 4p orbitals.

Thus, [Cr(H2O)6]3+ shows d2sp3 hybridization.

Hope this helps you...