... by a high wattage bulb. The temperature of the oil bath environment is measured by a thermometer and can be controlled by a dial knob. Procedure: 1.0010 grams of the unknown #42 was placed in a 25-ml Erlenmeyer flask. 10mL of non-sterile/non-deionized water along with 5mL of 95% EOH was heated for 10 minutes on a hot plate and dissolved the solid sample. The observed clear and bubble-filled supersaturated solution then cooled for 15 minutes on a tabletop until complete re-crystallization occurred. The white fibrous-like crystals were harvested by a spatula tool and placed in a polypropylene funnel equipped with a frit. This funnel was then placed into a vacuum filtration device where the excess water/ethanol was vacuum into a sealed container. The crystals was allowed to dry for>12 hours. A small amount of the crystals were evenly and densely packed into a capillary tube for melting point analysis. The ...

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