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When excess of AgNO3 is treated with KI solution, AgI form a) +ve charged sols b) -ve charged sols c) neutral sol

When excess of AgNO3 is treated with KI solution, AgI form


a) +ve charged sols


b) -ve charged sols


c) neutral sol

Grade:

2 Answers

abhishek ganguly
8 Points
10 years ago

If AgNO3 is added to KI medium then negative charged sol is formed due to adsorption of iodide ions from KI onto the AgI precipitate.

If KI is added to AgNO3 then postive sol is formed due to Ag+ ions in solution which get adsorbed on AgI.

In this case answer should be a)

Kushagra Madhukar
askIITians Faculty 629 Points
one year ago
Hello Student
The two compounds will first react to form AgI as a product.
Since, AgNO3 is in excess and KI has been added, hence Ag+ ions in solution will be in excess in the solution and get absorbed on AgI, creating positively charged Sols.
AgI + AgNO3 → [AgI]Ag+ + NO3-

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