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In a polar solvent, PCl(5) undergoes an ...

In a polar solvent, `PCl_(5)` undergoes an ionization reaction as :
`" "2PCl_(5)hArrPCl_(4)^(+)+PCl_(6)^(-)`
What are the geometrical shapes of the species involved in the equilibrium mixture ?

Text Solution

Verified by Experts

The geometry can be predicted on the basis of hydrisation (H) which may be calculated as:
`H=1/2` [No. of electrons in the valence shell of the atom + No. of monovalent atoms surrounding the atom- charge on cation + charged on anion]
`PCl_(5) :" "H=1/2[5+5-0+0]=10/2=5(sp^(3)d)`
The geometry of the molecule is trigonal bi pyramidal.
`PCl_(4)^(+) :" "H=1/2[5+4-1+0]=8/2=4(sp^(3))`
The geometry of the ion is tetrahedral.
`PCl_(6)^(-) :" "H=1/2[5+6-0+1]=12/2=6(sp^(3)d^(2))`
The geometry of the ion is octahedral.
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