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【Daily Question】Chemical Analysis Version, 2021.11.25

2021-11-25View Original

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In a mixed solution of Fe3+, Al3+, Ca2+, and Mg2+, when using EDTA to determine the concentrations of Fe3+ and Al3+, the simplest method to eliminate the interference from Ca2+ and Mg2+ is: A. Precipitation separation method; B. Control of acidity; C. Coordination masking method; D. Solvent extraction method. B

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