A drop of PbNO3 solution is added to 100.0 mL of 1.0 M Na2S solution. If the solubility of PbS is surpassed and the conditions are ideal for colloid formation, the formula of the most probable colloid will be   Group of answer choices PbS:S2-::Pb2+  PbS:S2-::Na+ PbS:Ag+::NO3- PbS:Ag+::S2-

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