74. Solving a chemistry problem
5. To 100 ml of 0.02% sodium chloride solution, 250 ml of silver nitrate solution were added; С(AgNO3)=0.001 mol/l. Determine which of the following electrolytes: KBr, Ba(NO3)2, K2Cr2O7, MgSO4, AlCl3 has the lowest coagulation threshold?
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