ChemPrelabNotes1

ChemPrelabNotes1 - -3 mL conical vial-Short Pasteur pipet...

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Pre-Lab Notes: Experiment 1 Exercise 1, Option C The goal is to use a graduated pipet and obtain density figures for water and hexane from our measurements. Equipment needed: - 3mL conical vial - 1.0 mL graduated pipet - 0.50 mL hexane Procedure: - Weigh the conical vial to the nearest 0.001g - Using the pipet, dispense 0.50 mL of water into the vial, put the cap back on and weigh the vial a second time - Determine the weight of the water added - Calculate the density of the water - Repeat using 0.50 mL hexane and calculate the density of that as well Compare the density results with the known densities of water and hexane. Exercise 2 The goal is to practice the technique of extraction. Equipment:
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Unformatted text preview: -3 mL conical vial-Short Pasteur pipet with rubber bulb Procedure:-Calibrate the pipet by weighing out 0.5 grams and 1.0 grams of water and marking the levels the water reaches in the pipet as 0.5 mL and 1.0 mL, respectively-Place the two immiscible liquids in the vial, seal the top-Shake the vial to mix the liquids thoroughly-Periodically loosen the cap and tighten it again-After about 5 or 10 seconds of shaking, loosen the cap to vent the vial, retighten it, and allow the vial to stand upright in a beaker until the two liquid layers separate completely-Carefully remove the lower layer with a pipet without removing any of the upper layer...
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