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A sol is prepared by addition of excess ...

A sol is prepared by addition of excess of `AgNO_(3)` solution in KI solution . The charge likely to develop on colloidal particles is :

A

postive

B

negative

C

no charge

D

both charges

Text Solution

AI Generated Solution

The correct Answer is:
To determine the charge likely to develop on colloidal particles when excess AgNO₃ is added to KI solution, we can follow these steps: ### Step 1: Understand the Reaction When AgNO₃ is added to KI solution, a precipitation reaction occurs. The silver ions (Ag⁺) from AgNO₃ react with the iodide ions (I⁻) from KI to form silver iodide (AgI), which is a colloidal particle. ### Step 2: Identify the Colloidal Particle The colloidal particle formed is AgI. This particle can carry a charge due to the presence of excess iodide ions in the solution. ### Step 3: Determine the Charge on the Colloidal Particle In this case, the AgI colloidal particles will selectively adsorb the I⁻ ions from the surrounding solution. This selective adsorption of I⁻ ions onto the surface of the AgI particles leads to the development of a net negative charge on the colloidal particles. ### Step 4: Conclusion Therefore, the charge likely to develop on the colloidal particles of AgI is negative. ### Final Answer The charge likely to develop on colloidal particles is **negative**. ---
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