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An 800 mg sample of chromium ore was dissolved and the chromium oxidized to chromate ion....

An 800 mg sample of chromium ore was dissolved and the chromium oxidized to chromate ion. The solution was treated with 10.0 ml of 0.20 M AgNO3. The resulting precipitate of Ag2CrO4 was removed and discarded. The excess AgNO3 required 14.50 ml of a 0.120 M KSCN for titration. Calculate the %Cr2O3 in the ore.

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