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Which mixture of the solutions will lead to the formation of negatively charged colloidal $[AgI]I^-$ sol.?
A
50 mL of 1 M $AgNO_3$ + 50 mL of 1.5 M KI
B
50 mL of 1 M $AgNO_3$ + 50 mL of 2 M KI
C
50 mL of 2 M $AgNO_3$ + 50 mL of 1.5 M KI
D
50 mL of 0.1 M $AgNO_3$ + 50 mL of 0.1 M KI