What will be the charge on Agl colloidal particles when it is prepared by addition of small amount of AgN03 to KI solution in water. What is responsible for development of this charge? [AI 2015 Bhubaneswar; Delhi 2012(C)]
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Answer:
Negative charge
Explanation:
When silver nitrate solution is added to KI solution, the precipitated AgI adsorbs iodide ions from the dispersion medium and negatively charged colloidal solution results. Since KI is in excess, iodide ions (I-) will be adsorbed on the surface of AgI particles thereby giving them a negative charge.
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