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Both Co^(3+) and Pt^(4+) have a coordina...

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

A

a)`CoCl_(3).4NH_(3) and PtCl_(4).4NH_(3)`

B

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

C

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

D

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

Text Solution

Verified by Experts

The correct Answer is:
C
`Co^(3+)andPt^(4+)=6` coordination number
`CoCl_(3).6NH_(3)andPtCl_(4).5NH_(3)`
`[Co(NH_(3))_(6)]Cl_(3)overset("In solution")rarr[Co(NH_(3))_(6)]^(3+)+3Cl^(-)`
`[PtCl(NH_(3))_(5)]Cl_(3)overset("In solution")rarr[PtCl(NH_(3))_(5)]^(3+)+3Cl^(-)`
Number of ionic species are same in the solution of both complexes, therefore their equimolar solutions will show same conductance.
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