140. Solving a chemistry problem
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Product description
After dissolving a weighed portion of 0.10 g of an unknown iron oxide and reducing the metal to Fe2, 12.61 ml of a K2Cr2O7 solution with a concentration of 0.9930 mol-equiv / L is consumed for titration. Determine what formula the analyzed oxide had: FeO; Fe2O3 or Fe3O4?
Additional information
If you do not open the file - install the RAR archiver. Inside the archive you will find a solution in Word format.