Summary of Lab Procedure EXPERIMENT #3

Summary of Lab Procedure EXPERIMENT #3 - The Dumas Method...

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The Dumas Method: Molar Mass of a Volatile Liquid Materials three 125 mL Erlenmeyer flasks 1 thermometer, -20 o C 1 metal rod 1 utility clamp 1 hot plate 2 boiling chips 6 squares of aluminum foil 6 elastic bands 1 pushpin Procedure 1. On arrival set up boiling water bath using hotplate + 400 mL of deionized water in 600 mL beaker Add 1-2 boiling chips. 2. Form six sets of equipment, each containing one 125 mL Erlenmeyer flask, one elastic band and one square of aluminum foil label #1 -#6 3. Use analytical balance weigh each set of equipment + record mass 4. Once water bath boils, place approx. 4 mL of methanol into a 125 mL Erlenmeyer flask cover with an aluminium square to for cap secure with elastic band poke two holes into foil to allow excess vapour to escape during heating. 5. Clamp Erlenmeyer flask assembly into the water bath at 45
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