3. Chromium contained in 1.8700 chromite FeO*Cr2O3 was oxidized to chromium (6). To the acidified solution was added 50.00 cm3 of 0.1600 N Mohr's salt solution. For titration of the excess of Mohr's salt, 5.8 cm3 of 0.025 C1/z n solution of potassium dichromate were used. Calculate the mass fraction of chromium in chromite.

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