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A coordination compound is made of Co^(3...

A coordination compound is made of `Co^(3+),NH_(3)andCl^(-),0.1M` solution of this complex when treated with excess silver nitrate gaye no precipitate. The formula of the complex and secondary valency of metal are respectively.

A

`[Co(NH_(3))_(3)Cl_(3)],6`

B

`[Co(NH_(3))_(5)Cl]Cl_(2),6`

C

`[Co(NH_(3))_(3)Cl_(3)],3`

D

`[Co(NH_(3))_(4)Cl_(2)]Cl,6`

Text Solution

Verified by Experts

The correct Answer is:
A
Since, no precipitate of AgCl is obtained on treating the compound with silver nitrate that means no `Cl^(-)` ions are available outside the coordination sphere. So, correct formula of coordination compound is `[Co(NH_(3))_(3)Cl_(3)]`. Since, central metal Co forms six coordination bonds thus the secondary valency is 6.
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