Gradual addition of potassium iodide solution to aqueous BiNO_33 solution initially produces a dark brown precipitate which dissolves in excess of KI…

Question

Gradual addition of potassium iodide solution to aqueous BiNO_33 solution initially produces a dark brown precipitate which dissolves in excess of KI to give a clear yellow solution. Identify the yellow precipitate.

MARKS Content Team · Accepted Answer

Correct answer: (B) KI_3. At first BiNO_33 undergoes hydrolysis. Nitric acid is formed which oxidises I^(−) to iodine. The liberated iodine dissolves in K to form yellow precipitate of KI_3 . BiNO_33+ H_2O→BiOHNO_32 + HNO_3 2HNO_3→H_2O + 2NO_2+ O 2KI+ H_2O + O→2KOH +I_2Dark brown I_2+ KI→KI_3yellow solution

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 $KI$ to give a clear yellow solution. Identify the yellow precipitate.

Solution

More Practical Chemistry Questions

Gradual addition of potassium iodide solution to aqueous BiNO33 solution initially produces a dark brown precipitate which dissolves in excess of KI to give a clear yellow solution. Identify the yellow precipitate.

Solution

More Practical Chemistry Questions

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 $KI$ to give a clear yellow solution. Identify the yellow precipitate.