1. Provide a table that lists the concentration of iron (II) in units of milligrams of iron per litre, and the measured absorbances, for the solutions in test tube 2-5. Provide sample calculations for test tube 2. Test tube 2: 0.260 A, test tube 3: 0.555 A, test tube 4: 0.361 A, test tube 5: 1.048 A. The concentration of standard iron(II) solution=20.1/0.100=201 mg. The volume of standard iron(II) solution made is 100 mL.
test tube | 1% hydroxylamine l 1 M sodium | 0.1% 1,10- l distilled prepared solution hydrochloride acetate phenanthroline water 1.0 mL 1.0 mL 1.0 mL 1.0 mL 1.0 mL (blank)1.0 mL 1.0 mL 1.0 mL 6.0 mL iron(II) standard: 1.0 mL 1.0 mL 7.0 mL None 1.0 mL 1.0 mL 1.0 mL 1.0 mL 1.0 mL Iron(II) standard: 2.0 mL 5.0 mL 4.0 mL iron(II) standard: 3.0 mL iron(II) standard: 4.0 mL vitamin solution: 5.0 mL 1.0 mL 30 ml iron(Il) standards 11.0 mL 2.0 mL| 1.0mã 10mL
