A positively charged colloidal sol is formed in which of the following?
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a
100mL of 01 M AgNO3+100 mL or 0.1 MKI
b
100 mL of 0.1 M AgNO3 50 mL or 0.1 M KI
c
50 mL of 0.1 M AgNO3+100 mL of 0.1 M KI
d
200 mL of 0.1 M AgNO3+100 mL of 0.2 M KI
answer is B.
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Detailed Solution
Agl is precipitated. If AgNO3, is in excess, Ag+ is adsorbed on Agl and positively charged colloidal sol is formed.AgNO3+KI⟶AgI+KNO3AgI+Ag+⟶[AgI]Ag+ excess