The correct order of stoichiometries of `AgCI` formed when `AgNO_(3)` in excess is treated with the complex:
`CoCI_(3) . 6NH_(3), CoCI_(3) . 5 NH_(3), CoCI_(3) . 4NH_(3)` respectively is:

Options

A. `3 AgCI, 1 AgCI, 2 AgCI`
B. `3 AgCI, 2 AgCI,1 AgCI`
C. `2 AgCI, 3 AgCI, 1 AgCI`
D. `1 AgCI, 3 AgCI, 2 AgCI`

Answer

B

Explanation

`CoCl_(3). 6NH_(3) implies [Co (NH_(3))_(6)] Cl_(3) implies 3 AgCl`
`CoCl_(3). 5NH_(3) implies [Co(NH_(3))_(5) Cl] Cl_(2) implies 2 Ag Cl`
`CoCl_(3). 4NH_(3) implies [Co(NH_(3))_(4) Cl_(2)] Cl implies 1AgCl`
Note that only `Cl` present outside the coordination sphere is ionizable.