Aluminium chloride in acidified aqueous solution forms a complex ‘X’. Hybridization of ‘Al’ in the complex is
sp3d
sp3
dsp2
sp3d2
The complex formed is [Al(H2O)6]Cl3 (or) AlCl3.6H2O
Hybridization of ‘Al’ in [Al(H2O)6]+3 is sp3d2. The complex has octahedral geometry.