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Cobalt (III) chloride forms several octa...

Cobalt (III) chloride forms several octahedral complexes with amonia. Which of the following will not give test for chloride ions with silver nitrate at `25^@C`?

A

`CoCl_(3), 5NH_(3)`

B

`CoCl_(3). 6NH_(3)`

C

`CoCl_(3). 3NH_(3)`

D

`CoCl_(3). 4NH_(3)`

Text Solution

Verified by Experts

The correct Answer is:
C
All the complexes are of octahedral nature which means that the `Co^(3+)` ion has six ligands attached to it in the co-ordination sphere. The complex `CoCl_3.3NH_3` will not give any white precipitate with silver nitrate solution since it has no free `Cl^(-)` ions present in the ionisation sphere.
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