Question

An aqueous solution of inorganic compound
00 gives following reactions:
(I)with an aqueous solution of bariun chloride a
precipitate insoluble in dil. HCl is obtained.
(ii) Addition of access of Ky gives a brown ppt, which turns
white on addition of excess of hypo.
(iii) With an aqueous solution of K [Fe(CN).), a chocolate
coloured precipitate is obtained
Identify (X) and give equations for the reaction (I),(ii) and(iii)​

Answer 1

Answer:

(i) : Copper sulphate reacts with barium chloride to form white precipitate of barium sulphate.

CuSO

4

+BaCL

2

⟶BaSO

4

(whiteppt)+CuCl

2

White precipitate of BaSO

4

is insoluble in dilute HCl.

(ii) : 2CuSO

4

+4KI⟶Cu

2

I

2

↓(browncolor)+I

2

+2K

2

SO

4

It turns white on addition of excess of hypo.

(iii) : Copper sulphate reacts with potassium ferrocyanide to obtain chocolate coloured precipitate of cupric ferrocyanide.

2CuSO

4

+K

4

[Fe(CN)

6

]⟶Cu

2

[Fe(CN)

6

](chocolatecolouredprecipitate)+2K

2

SO

4

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