(a) In a polar solvenbt ,` PCl_(5)` undergoes an ionization reaction as follows : ` 2 PCl_(5) hArrPCl_(4)^(+) + PCl_(6) ^(-)` Wht will be the geometrical shape of each
species present In the equalilbrium maxture ?
(b) Why does ` PCl_(5)` exist as ` [ PCl_(4)]^(+) [PCl_(6)]^(-)` ?

Explanation

### Step-by-Step Solution:

**(a)** To determine the geometrical shape of each species present in the equilibrium mixture of the reaction:

\[ 2 \text{PCl}_5 \rightleftharpoons \text{PCl}_4^{+} + \text{PCl}_6^{-} \]

1. **Identify the Geometry of PCl₅:**
- PCl₅ has a trigonal bipyramidal geometry. This is due to the presence of five bonding pairs of electrons around the phosphorus atom. The hybridization of phosphorus in PCl₅ is \( sp^3d \).
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