75. Solving a chemistry problem

75. Solving a chemistry problem

341. Coagulation of a sol of iron hydroxide (III) with a volume of 4 liters occurred with the addition of a 10% solution of magnesium sulfate with a volume of 0.91 ml (density 1.1 g / ml). Calculate the threshold for coagulation of the sol by sulfate ions.
Answer: 0.21 mmol / l.

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