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Use an oxidation reduction titration to determine the amount of iron in steel wool.
Member rating: No Rating | Words: | Submitted: Wed Sep 22 2004
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Aim: To use an oxidation reduction titration to determine the amount of iron in steel wool. Equipment: Refer to sheet Method: Refer to sheet Hypothesis: If the concentration of potassium permanganate can be obtained then the amount of iron in steel wool can be calculated. Results: Preparation of Solution A Mass of Steel Wool: 1.07 g Volumetric Flask: 250 mL Sulphuric Acid: 100 mL Aliquot: 25 mL Steel Wool Mass: 1.07 g Rough 1st Titration 2nd Titration Final Volume 39.4 39.2 39.2 Initial Volume 0 0 0 Titre 39.4 39.2 39.2 Average 39.2 Preparation of Solution B Mass of Iron Ammonium Sulphate: 4.9 g Volumetric Flask: 250 mL Sulphuric Acid: 100 mL Aliquot: 25 mL Iron(II) Ammonium Sulfate Mass: 4.9 g Rough 1st Titration 2nd Titration Final Volume 25.5 mL 25.1 mL 25.0 mL Initial Volume 0.0 mL 0.0 mL 0.0 mL Titre 25.5 mL 25.1 mL 25.0 mL Average 21.05 Discussion: Every atom in an equation is assigned an oxidation number, according to certain rules. If the oxidation number of an atom increases on the left side to the right side of an equation, then oxidation has occurred (electrons have been lost); if the oxidation number decreases, reduction has occurred (electrons have...
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