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The approach to the following equilibriu...

The approach to the following equilibrium was observed kinetically form both directions:
`[PtCl_(4)]^(2-) +H_(2)O hArr [Pt(H_(2)O)Cl_(3)]^(ɵ)+Cl^(ɵ)`
At `25^(@)C` it was found that at `0.3` inoic strength `- (Delta [PtCl_(4)]^(2-))/(Delta t) = (3.9 xx 10^(-5)s^(-1))[PtCl_(4)]^(2-)`
`- (2.1 xx 10^(-3) L mol^(-1) s^(-1))[Pt(H_(2)O)Cl_(3)]^(ɵ)[Cl_(3)^(ɵ)]`
What is the value of `k` for the complexation of the fourth `Cl^(ɵ)` by `Pt(II)` at `0.3` ionic strenght.

Text Solution

Verified by Experts

At equilibrium,`(Delta [PtCl_(4)]^(2-))/(Delta t) = 0`
`:. (3.9 xx 10^(-5) s^(-1))[PtCl_(4)]^(2-) = (2.1 xx 10^(-3)L mol^(-1) s^(-1))[Pt (H_(2)O)Cl_(3)]^(ɵ)[Cl^(ɵ)]`
For the reverse reaction given above
`k = [PtCl_(4)]^(2-//) [Pt(H_(2)O)Cl_(3)]^(ɵ)[Cl^(ɵ)]`
`= (2.1 xx 10^(-3))/(3.9 xx 10^(-5)) = 54`
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