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A complex of cobat with ammonia is analy...

A complex of cobat with ammonia is analyzed for determining its formula, by titrating it against a strandarized acid as follows :
`Co(NH_(3))_(x)Cl_(y)(aq)+Hclrarr NH_(4)^(+)(aq)+Co^(y+)+(aq)+Cl^(-)(aq)`
A 1.8 g complex required 20.00 mL 1.54 M HCl to reach the equivalence point. Also, if the reaction mixture at equivalence point is treated with excess of `AgNO_(3)` solution, 7.735 g of AgCl precipitate was produced. What is the formula of this complex?
`["Given : atomic weight of CO = 59 gmol"^(-1)]`

A

`CO(NH_(3))_(4)Cl_(3)`

B

`CO(NH_(4))_(4)Cl_(3)`

C

`CO(NH_(3))_(3)Cl_(4)`

D

`CO(NH_(4))_(3)Cl_(4)`

Text Solution

Verified by Experts

The correct Answer is:
A
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