Extraction of Caffeine from Tea

Experiment 1: beginning of Caffeine from Tea The primary absorbed of the experiment is to separate the caffein from tea leaf leaves. The mixing of tea and the calcium change is separated from tea leaves by clean filtration. The sol handout used in lineage of caffeine is methylene group chloride. anhydrous milligram sulfate is added to the methylene chloride solution to dehydrate the categorisation. The methylene chloride is indeed separated from the miscellany in the rotary evaporator. wee 1: The structure of caffeine is very similar to those of purine bases (adenine and guanine) in DNA, therefore caffeine is a good substance to posture on for dealing with nucleic acids. Procedure round 10g of tealeaves, CaCO3 (4.8g, 0.048 mol) and deionised H2O (100mL) is added into a beaker and brood for 15 minutes. The mixture is because cooled to 20?C and is strain utilise a Buchner funnel (vacuum filtration). The extraction process is when a solvent, dichloromethane (15mL) is added to the puree in a separatory funnel; the mixture is thinly swirled together 3 times, and stopcock is released in between to vent the funnel. Dichloromethane (including the emulsion) is then knackered from the bottom into a 50mL Erlenmeyer flask.

aforesaid(prenominal) extraction process is repeat on the same filtrate and the dichloromethane is, once again, permit out to the same 50mL Erlenmeyer flask as before. The combined dichloromethane solution and water (20mL) is poured into a rinsed separatory funnel. Mixture is gently swirled and drained out into an Erlenmeyer flask. Anhydrous magnesium sulfate is added to dehydrate the wash mixture. The solution is then puree into a weighed, dry, 100mL Erlenmeyer flask. Dichloromethane in the mixture is vaporized with a rotary evaporator. The Caffeine, white powderize residue, (0.0486g) should be obtained. Results Caffeine: C8H10N4O2 scuttlebutt: a white unflavored substance The amount of caffeine obtained from 10g of tealeaves: 0.0486g/ 48.6mg Discussion...If you motive to get a safe essay, order it on our website: Ordercustompaper.com

If you want to get a full essay, wisit our page: write my paper