Gradual addition of KI solution to BI(NO 3 ) 3 solution initially produces a dark brown precipitate which dissolves in excess of KI to give a clear yellow solution. Write chemical equations for the above reaction

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Navjyot Kalra · Answer

At first Bi(NO 3 ) 3 hydrolyses to give nitric acid which, being an oxidizing agent, oxidizes potassium iodide liberating free iodine responsible for dark brown precipitate. Iodine dissolved in excess of potassium iodide forming soluble KI 3 imparting yellow colour to solution. Bi(NO 3 ) 3 + H 2 O &rarr; [Bi(OH)(NO 3 ) 2 ] + HNO 3 NO 3 ‑ + 4 H + + 3e - &rarr; NO 2 + 2H 2 O] * 2 Ki + I 2 &rarr; KI 3 (yellow solution)

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Gradual addition of KI solution to BI(NO 3 ) 3 solution initially produces a dark brown precipitate which dissolves in excess of KI to give a clear yellow solution. Write chemical equations for the above reaction

Gradual addition of KI solution to BI(NO₃)₃ solution initially produces a dark brown precipitate which dissolves in excess of KI to give a clear yellow solution. Write chemical equations for the above reaction

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Gradual addition of KI solution to BI(NO 3 ) 3 solution initially produces a dark brown precipitate which dissolves in excess of KI to give a clear yellow solution. Write chemical equations for the above reaction

Gradual addition of KI solution to BI(NO3)3 solution initially produces a dark brown precipitate which dissolves in excess of KI to give a clear yellow solution. Write chemical equations for the above reaction

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Gradual addition of KI solution to BI(NO₃)₃ solution initially produces a dark brown precipitate which dissolves in excess of KI to give a clear yellow solution. Write chemical equations for the above reaction