Calculate the %w/w As2O3 in a 2.025-g sample of insecticide that yields 207.5 mg of Mg2As2O7

Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter11: Solutions
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The concentration of arsenic in an insecticide can be analyzed gravimetrically by precipitating it as MgNH4AsO4. The precipitate is ignited and weighed as Mg2As2O7. Calculate the %w/w As2O3 in a 2.025-g sample of insecticide that yields 207.5 mg of Mg2As2O7
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