3. Give an assessment of the quality of calcium chloride in terms of quantitative content, if, according to the method of trilonometric determination, when weighing a substance, 0.7989 g was spent on the determination of 18.3 ml of a 0.05 M solution of Trilon B (KP = 1.0000), and on the control experiment - 0.15 ml of the same titrant.

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