30. Solving a chemistry problem
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1. PbI₂ sol was obtained by mixing equal volumes of 0.007 N Pb(NO₃)₂ solution and 0.009 N NaI solution. Determine the sign of the charge of the sol particles and write the formula of the micelle. Determine the type of sol coagulation when adding electrolyte solutions: Pb(CH₃COO)₂ or (K₂SO₄)
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