In a certain polar solvent, PCl_(5) undergoes ioonisation as follows: 2PC l_(5) hArr PCl_(4)^(+)+PCl_(6)^(-), predict geometrical shapes of all the species involved.

In a certain polar solvent, PCl_(5) undergoes ioonisation as follows:

1.	In a certain polar solvent, PCl_(5) undergoes ioonisation as follows: 2PC l_(5) hArr PCl_(4)^(+)+PCl_(6)^(-), predict geometrical shapes of all the species involved.
Answer» Solution :The geometrical shapes of the molecules or ions can be PREDICTED from the hybridisation state of the central atom. for `PC l_(5):H=(1)/(2)[5+5-0+0]=(10)/(2)=5` THEREFORE, central P-atom is `SP^(3)d`-hybridised. Consequently, the molecule is trigonal bipyramidal in shape. For `PCl_(4)^(+):H=(1)/(2)[5+4-1+0]=(8)/(2)=4`. Therefore, central P-atom is `sp^(3)`-hybridised. consequently, the geometrical shape of this ion is tetrahedral. For `PCl_(6)^(-):H=(1)/(2)[5+6-0+1]=(12)/(2)=6`. Thereofore, the central P-atom is `sp^(3)d^(2)` hybridised. consequently, the geometrical shape of the ion is octahedral.