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Unformatted text preview: Explain how you can use standard volumetric glassware to make a solution that is 1.280 ppm EB. Table 4.2 on page 59 of your text lists the types of transfer pipets and volumetric flasks available to you. You many use any combination of these that you desire and may use more than one dilution. There are many solutions to this problem. 3. To determine the amount of iron in a dietary supplement (in which iron is present as FeSO 4 •7H 2 O), a random sample of 15 tablets weighing a total of 20.505 g was ground into a fine powder. A 3.116-g sample of the powdered tablets was dissolved and treated with NaOH, precipitating the iron as Fe(OH) 3 . The precipitate was collected, rinsed, and ignited to a constant weight as Fe 2 O 3 , yielding 355 mg. Report the average iron content of the dietary supplement as g FeSO 4 •7H 2 O per tablet....
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This note was uploaded on 04/02/2012 for the course CHEMISTRY 222 taught by Professor Mcdonald during the Fall '11 term at University of Illinois, Urbana Champaign.
- Fall '11
- Analytical Chemistry