1.

CoCl_(2) + KNO_(2) + CH_(3)COOH to [X] +H_(2)O +KCl + CH_(3)COOK +NO (Unbalenced equation)

Answer»

`X` is a yellow crystalline solid INSOLUBLE in water.
`X` is a green coloured compounds known as kinman's green
`IUPAC` name of `X` is POTASSIUM hexanitrito-`N`-cobaltate (II)
The compound `X` is an inner orbital complex.

Solution :`Co^(2+)+7NO_(2)^(-)+3K^(+)+2H^(+)toK_(3)[Co(NO_(2))_(6)]DARR("yellow")+NO darr+H_(2)O`
So `[X]` is `K_(3)[Co(NO_(2))]_(6)` It is called Fischer's reagent, `[Co(III)(NO_(2))_(6)]^(3-)` has `d^(2)sp^(3)` HYBRIDISATION and is diamagnetic . It `IUPAC` name is potassium hexanitrito-`N`-cobaltate`(III)`.


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