Which of the following is the most likely structure of `CrCl_3*6H_2O`, if `1//3` of total chlorine of the compound is precipitated by adding `AgNO_3` to its aqueous solution:

Options

A. `CrCl_3*6H_2O`
B. `[Cr(H_2O)_3Cl_3].3H_2O`
C. `[CrCl_2(H_2O)_4]Cl.2H_2O`
D. `[CrCl(H_2O)_5]Cl_2H_2O`

Answer

C

Explanation

`{:([CrCl_(2)(H_(2)O)_(4)]Cl.2H_(2)O),(" "darrAgNO_(3)),(" "AgCl ppt.):}`
Only one chloride ion is present out of coordination sphere.
Only those ions that are present out of coordination sphere participate in precipitation.