1.

Both Co^(3+) and Pt^(4+) have a coordination number of six. Which of the following pairs of complexes will show approximately the sameelectrical conductance for their 0.001 M aqueous solutions?

Answer»

`CoCl_(3).4NH_(3)` and`PtCl_(4).4NH_(3)`
`CoCl_(3).3NH_(3)` and `PtCl_(4).5NH_(3)`
`CoCl_(3).6NH_(3)` and `PtCl_(4).5NH_(3)`
`CoCl_(3).6NH_(3)` and `PtCl_(4).3NH_(3)`

Solution :`CoCl_(3).6NH_(3)` and `PtCl_(4).5NH_(3)`
This PAIR of complexes will show approximately same electrical coductance for their 0.001 M aqueous solution s
`underset([Co(NH_(3))_(6)]^(3+)+3Cl^(-))underset(DARR "in solution")([Co(NH_(3))_(6)]Cl_(3))""underset([Ptcl(NH_(3))_(5)]^(3+)+3Cl^(-))underset(darr"in solution")([PtCl(NH_(3))_(5)]Cl_(3))`
As the number of IONIC species is solution due to both the complexes are EQUA,, therefore their equimolar solutions will show approximately same conductance.


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