CHEM2090-LAB-EXP2-pg3-2010 - 3 might appear briefly After...

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Experiment 2: Synthesis of Potassium Tris(oxalato)Ferrate(III) Trihydrate 2 – 3 Figure 2.1 Support the thermometer using a ring-stand, clamp, and split one-hole stopper. Place the thermometer in the solution. Carefully heat the solution to 40ºC. Obtain 20 mL of 3% H 2 O 2 (hydrogen peroxide) in a 25 mL graduated cylinder. Add the 20 mL of H 2 O 2 very slowly (a few drops at a time) stirring continuously and keeping the temperature near 40ºC. A small amount of a slimy red precipitate [iron(III) hydroxide, Fe(OH)
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Unformatted text preview: 3 ] might appear briefly. After adding all the hydrogen peroxide, heat to boiling. To the boiling solution add 8 mL of 1 M H 2 C 2 O 4 —the first 5 mL all at once and the last 3 mL very slowly—keeping the solution boiling. Set up a funnel with filter paper on a ring-stand and gravity filter the boiling solution into a clean plastic specimen cup (see Figure 2.2). Figure 2.2 Gravity filtration apparatus....
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