converted to a liquid that’s collected in a receiver flask. The temperature of the gas phase rises again until it reaches the boiling point of a second content in the mixture and so on. By simple microscale distillation‚ we purified an unknown organic compound and then identified the unknown organic compound by using the boiling point and density measurements. Procedure/Results 5 mL of the unknown impure organic A was collected in an Erlenmeyer flask. A simple distillation apparatus was assembled
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Extraction of Caffeine from Tea Leaves Department of Biological Sciences‚ College of Science University of Santo Tomas España‚ Manila‚ 1028 ABSTRACT: Caffeine is a white crystalline xanthine alkaloid that acts as a stimulant drug. Caffeine is found in varying quantities in the seeds‚ leaves‚ and fruit of some plants. It is most commonly consumed by humans in infusions extracted from the seed of the coffee plant and the leaves of the tea bush‚ as well as from various foods and drinks containing
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Formation of an Alkene by Alcohol Dehydration Lab Report Balanced Chemical Equation for the Main Reaction Mechanism The acid-catalyzed dehydration of secondary and tertiary alcohols involves non-isolable carbocation intermediaries. In the first step of the of the reaction mechanism below‚ a phosphoric acid catalyst adds a proton to the oxygen atom of the alcohol to form an oxonium ion. The OH is converted to a better leaving group as the positive charge on the oxygen weakens the carbon-oxygen
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materials Procedure: Part A 2.014 g of Panacetin was measured and put inside a 125 mL Erlenmeyer flask. 35 mL of Dichloromethane (DCM) was added to the 125 mL Erlenmeyer flask. After addition of DCM the Panacetin lumps were crushed with a stirring rod. Next a fluted filter paper was pre-weighed. The filter paper weighed around .860 g. Gravity filtration was then used to filter the mixture into a 125 mL collecting flask. The mixture was filtered in order to separate the crude sucrose from the mixture
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Cobalt(II) Oxygen adduct complex Inorganic 461 lab 2-29-2012 Abstract This experiment uses Co(salen) as a model compound illustrating the uptake of oxygen in hemoglobin. SalenH2 was prepared as the intermediate‚ and reacted with hydrated cobalt to prepare Co(salen). Using Co(salen) the oxygen up-take was tested. The synthesis of SalenH2 produced 0.65 g. The percent yield of salenH2 was 116% on the filter paper and 105% after transferring salenH2 to a vial. The melting point of salenH2‚ was
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This flask was placed in a water bath on a magnetic stirrer. 3 mL of of 6% aqueous sodium hypochlorite was slowly added to the flask while maintaining a temperature below 30 degrees celsius. After thirty minutes a Starch/Iodine test was conducted to test for excess sodium hypochlorite‚ the strip did not change color so
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[pic] [pic] Florida A&M University Department of Chemistry CHM 1045 Lab Syllabus | COURSE SYLLABUS | |Course Number: CHM 1045L |Course Title: General Chemistry I Laboratory | |Prerequisite(s):
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were kept away from open flames. Material/Chemical List Glassware 25 mL round bottom flask 100 mL round bottom flask 25 mL filtration Erlenmeyer flask 3- 50 mL beaker Pasteur
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analysis to determine the concentration of either an acid or a base. Titration is the slow addition of an acid (or a base) of known concentration from a burette (a narrow graduated cylinder) to a base (or an acid) of unknown concentration fin an Erlenmeyer flask. There are two types of acids: strong acid and weak acid‚ and also two types of bases: strong base and weak base. Therefore four types of acid-base titrations are possible: strong acid-strong base‚ strong base-weak acid‚ weak acid-strong base
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OBJECTIVE: * To determine the molecular weight of a volatile liquid by using Dumas method. METHOD: MATERIAL | CHEMICALS | 125 mL Erlenmeyer flask | Known liquid (2-propanol) | Rubber band | Unknown liquid | Boiling chips | | Watch glass | | 100 mL graduated cylinder | | Pin | | 600 mL beaker | | Hot plate | | Thermometer | | Room temperature water | | 6 × 6 and 8 × 8 aluminium foil | | PROCEDURE: SAFETY * Lab Coat and Safety Goggles. * Keep the bottles
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