92. Solving a chemistry problem
60. Copper hydroxide sol obtained by pouring 0.1 l of 0.05 N. NaOH and 0.25 L 0.001 N. Cu(N03)r Which of the added electrolytes is KBr, Ba(N03)2; K, CrO4, MgS04, AlCl3 - has the lowest coagulation threshold?
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