A compound has the empirical formula `CoCl_(3).5NH_3`. When an aqueous solution of this compound is mixed with excess silver nitrate, 2 mol of `AgCl` precipitates per mol of compound. On reaction with excess HCl, no `NH_4^(+)` is detected. Hence it is

Options

A. (a) `[Co(NH_3)_5Cl_2]Cl`
B. (b) `[Co(NH_3)_5Cl]Cl_2`
C. (c) `[Co(NH_3)_5Cl_3]`
D. (d) `[Co(NH_3)_4Cl_2]Cl.NH_3`

Answer

B

Explanation

`underset(darr)[[Co(NH_3)_5Cl]]Cl_2+Excess AgNO_3rarr2AgCl`
Two chloride ions are present out of coordination sphere which is ionisable.