9. Solving a chemistry problem
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👤 Derkach
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118. Calculate the mass of iron ore sample so that when titrating the solution obtained after dissolving the ore and reducing iron to Fe2, with a SE 0.020 mol / dm3 with a solution of potassium dichromate, the volume of K2Cr2O7 (cm3) used for titration would be numerically equal to the mass fraction of iron in ore.
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