08. Solving a chemistry problem
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27. Calculate the copper content (w, %) in the ore if copper was transferred from a sample of ore weighing 0.6215 g into solution in the form of Cu2+. When KI was added to this solution, I2 was released, for the titration of which 18.23 cm3 of Na2S2O3 solution (T(Na2S2O3/Cu) = 0.062080 g/cm3) was consumed. Answer: 18.23%.
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