Question: A sample weighing 120. mg was dissolved in a 100.00mL flask and diluted to the mark. A 1.00mL aliquot of this solution was then placed

A sample weighing 120. mg was dissolved in a 100.00mL flask

A sample weighing 120. mg was dissolved in a 100.00mL flask and diluted to the mark. A 1.00mL aliquot of this solution was then placed in a 10.00mL volumetric flask and diluted to the mark. This unknown was analyzed for iron using a 5.00cm cell, with the following standard and unknown absorbance units: a) Find the molar absorptivity, . (m.w.=55.85g/mol) b) Find the unknown concentration (g/mL) of iron 10.00mL flask. c) Find the unknown concentration (w/w%) of iron in the original soil sample

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