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One molal solution of a complex of cobal...

One molal solution of a complex of cobalt chloeide with `NH_(3)` in aqueous s0olution shows boiling point elevaton of `2.08^(@)`. Assuming that the complex is compleltely ionised in solution, the xomplex is `(K_(b)"for water"=0.52 K kg mol^(-1))`.

A

`[Co(NH_(3))_(6)]CI_(3)`

B

`[Co(NH_(3))_(5)CI]CI_(2)`

C

`[Co(NH_(3))_(4)CI]CI_(2)I CI`

D

None of these.

Text Solution

Verified by Experts

The correct Answer is:
a
`(DeltaT_(b))/(K_(b)m)=((2.08K))/((0.52 K mol^(-1))xx(1m))=4`
This shows that the complex produces four ions in aqueous solution. Correct option is (a).
`[CO(NH_(3))_(6)]CI_(3)overset(("aq"))hArr[CO(NH_(3))_(6)]^(+)+3CI^(-)`
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