Chemistry, 16.10.2021 04:40 kobiemajak

14. Iron (III) is best determined by addition of excess EDTA, followed by back-titration with a metal ion that reacts rapidly with EDTA. A 700.0-mg sample is dissolved, 20.00 mL of 0.0500 M EDTA is added, and the excess EDTA is titrated with 5.08 mL of 0.0420 M copper (II). Calculate the percentage of Fe2O3.

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