Objective: 1. To determine the percent recovery from recrytalisation 2. To determine the thaw leg of the crystals formed 3. To purify a solid by recrystalisation. Apparatus: - Erlenmeyer flask - Filter make-up - Short-stemmed displace - Buchner funnel shape Material: - benzoic dot - Charcoal - Boiling chips role: About 2.0g of crude benzoic acid was weighed into a 250mL Erlenmeyer flask. ampere-second - 200mL of peeing with boiling chips were heated to boiling in a beaker on a naughty musical scale. An Erlenmeyer flask with a little piddle and boiling chips in it was heated. A short-stemmed funnel was rested at its neck and a slobber authorship was fluted to fit the funnel. A some boiling chips were added to the benzoic acid. live(a) water was added to it until the benzoic acid dissolve. The flask was kept on the livelytish plate in one case the hot water was added to keep it hot. Decolorizing charcoal was added because colored impurities were present. Th e hot resolving was clicked through the fluted filter paper into the heated flask. The archetype flask and the filter paper were rinsed with a little hot water. The root of benzoic acid was removed from the hot plate and allowed to cool. by and by 15 minutes, the flask was cooled in an ice bath.
The crystals formed were chill out by suction filtration using Buchner funnel. A miserly filter paper was fit to the Buchner funnel before pouring the crystals in. The crystals on the wet filter paper were transferred onto a fresh arrange of filter paper and were allowed to air-dry. Once the crystals are dried, the angle was taken an d recorded. Observations & Results: Ori! ginal weight of benzoic acid = 1.95g exercising weight of filter paper = 0.54g Weight of filter paper + benzoic acid crystal = 2.32g Weight... If you want to get a broad essay, order it on our website:
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