Gradual addition of potassium iodide solution to aqueous Bi(N O3)3 solution initially produces a dark brown precipitate which dissolves in excess of KI to give a clear yellow solution. Identify the yellow colour solution.

Question

Gradual addition of potassium iodide solution to aqueous Bi(N O3)3 solution initially produces a dark brown precipitate which dissolves in excess of KI to give a clear yellow solution. Identify the yellow colour solution. (A) I2 (B) KI3 (C) Bi(O H)2 (D) BiOH NO 32

Tardigrade Admin · Accepted Answer

At first Bi ( NO 3)3 undergoes hydrolysis. Nitric acid is formed which oxidises I-to iodine. The liberated iodine dissolves in K I to form yellow precipitate of KI 3. Bi ( NO 3)3+ H 2 O arrow[ Bi ( OH )( NO 3)2]+ HNO 3 2 HNO 3 arrow H 2 O +2 NO 2+[ O ] 2 KI + H 2 O +[ O ] arrow 2 KOH + underset text Dark brown I 2 I2+K I arrow underset text yellow solution K I3

Q. Gradual addition of potassium iodide solution to aqueous $B i (N O_{3})_{3}$ solution initially produces a dark brown precipitate which dissolves in excess of $K I$ to give a clear yellow solution. Identify the yellow colour solution.

$I_{2}$

$K I_{3}$

$B i (O H)_{2}$

$B i O H NO 3_{2}$

Q. Gradual addition of potassium iodide solution to aqueous Bi(NO3​)3​ solution initially produces a dark brown precipitate which dissolves in excess of KI to give a clear yellow solution. Identify the yellow colour solution.

I2​

KI3​

Bi(OH)2​

BiOHNO32​

Q. Gradual addition of potassium iodide solution to aqueous $B i (N O_{3})_{3}$ solution initially produces a dark brown precipitate which dissolves in excess of $K I$ to give a clear yellow solution. Identify the yellow colour solution.

$I_{2}$

$K I_{3}$

$B i (O H)_{2}$

$B i O H NO 3_{2}$