(a) (i) A solution of `[Co(NH_(3))_(4)I_(2)]Cl_(2)` when treated with `AgNO_(3)` gives a white precipitate. What should be the formula of isomer of the dissolved complex that gives yellow precipitate with `AgNO_(3)`. What are the above isomers called?
(ii) Write the following in the complex `[Cr("en")_(3)] [CrF_(6)]`
(i) Type of complex (ii) Ligands (iii) central metal
(iv) Oxidation state of central metal (v) IUPAC name

Explanation

(a) (i) 1 A solution of `[Co(NH_(3))_(4)I_(2)]Cl` when treated with `AgNO_(3)` gives a white precipitate. Because `Cl^(-)` ion is counter ion.
2. Formula of isomer of the dissolved complex that give yellow precipitate with `AgNO_(3) " is " [Co(NH_(3))_(4)Cl] I` because `I^(ө)` is counter ion
3. `[Co(NH_(3))_(4) I_(2)] Cl and [Co(NH_(3))_(4)Cl I]` I both are ionisation isomers
(ii)