2.0 ml of cyclohexanol and 1.0 ml of acetic acid into a 250 ml Erlenmeyer flask. Under a fume hood‚ slowly add 30 ml of bleach‚ and oxidizing agent‚ to the mixture and stir for 20 minutes. Acetic acid will react with bleach to make it a better oxidizing agent and form hopochlorous acid. Hypochlorous acid will then oxidize cyclohexanol. The mixture turned cloudy during the process but clear up after a few minutes. The flask will be warm since this is an exothermic reaction. Next‚ the mixture will
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M sodium carbonate by combining and stirring the two liquids in a beaker. Allow the mixture to stand. b.) Prepare the filtration assembly. The assembly consists of a tapered flask with a buchner funnel inserted in the top. The funnel has a rubber stopper attached to its stem in order to properly fit into the flask. The flask has a stem with a hose that is attached to a vacuum so that suction can be applied during filtering. c.) Place a filter on a clean dry watch glass. Weigh the two items together
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Transfer this solution into a clean 100 mL volumetric flask‚ rinsing the beaker solution into the volumetric flask to get to 100 mL of solution. 4) Pipette 10.0 mL of the standard iron (II) solution into a 250 mL Erlenmeyer flask. 5) Titrate the acidic iron (II) sample with KMnO4 (aq). 6) Repeat steps 4 and 5 until three consistent results are obtained within 0.1 mL. 7) Pipette 10.0 mL of H2O2 (aq) solution into a clean 250 mL Erlenmeyer flask. 8) Measure out 5.0 mL of H2SO4 (aq) solution and add
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was set up‚ a heating mantle was placed underneath the round-bottom flask and two rubber hoses were attached to the condensing tube. Now that the instruments were set up‚ the reagents were ready to be weighed and then added. Approximately 5 ml of isopentyl alcohol was added to a 10 ml graduated cylinder. Next‚ a 25 ml round bottom flask was placed on a cork ring and then tared on the balance. The alcohol was then added to the flask and the mass was recorded in a notebook. 7 ml of acetic acid was then
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Rossi/Kuwata Chemistry 222 Spring 2011 Experiment 2: Spectrophotometric Determination of Iron in Vitamin Tablets (Adapted from Daniel C. Harris’ Quantitative Chemical Analysis and R. C. Atkins‚ Journal of Chemical Education 1975‚ 52‚ 550.) Experimental work to be done on February 24 + one hour scheduled on your own Notebook due on March 4 (by 4:00 pm ⇒ 20% late penalty each 24 hour period thereafter) INTRODUCTION In this experiment‚ you will dissolve the iron in a vitamin supplement tablet‚
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RNH2 + HCl(aq) ( RNH3+Cl-(aq) Procedure: It was determined prior to carrying out the experiment that the unknown compound that was used contained a basic compound‚ not the acidic compound. One gram of the unknown was placed into an Erlenmeyer flask with approximately 30mL of MBTE. The solution was swirled and stirred until all of the unknown solid was dissolved‚ it was then decanted and placed into a separatory funnel. The unknown mixture contained a basic compound so 15mL of HCl was added to
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Benzoic Acid Purpose: The purpose of this experiment is to purify benzoic acid by crystallization. Procedure: 1. 0.5g impure benzoic acid was placed in a 50mL Erlenmeyer flask. 15mL of water was added and the mixture was heated to a boil on a hot plate. 0.5mL of water was added to the flask‚ while swirling the flask. The mixture was boiled until the benzoic acid completely dissolved. The total volume of water used was recorded. The black solid that remain in the dissolved mixture was the
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1 SN2 Reaction‚ Ionic Liquid (Group – hood) Background Reading Solomons and Fryhle Chapter 6 (Substitution/Elimination Reactions) Techniques: Weights and Measures‚ Reflux‚ Liquid-Liquid Extraction‚ Distillation. Introduction The SN2 reaction is a bimolecular nucleophilic substitution reaction where the nucleophile (a molecule with a free pair of electrons) reacts with an alkyl halide and replaces the halogen (for more details see Solomons and Fryle‚ Chapter 6). The nucleophile approaches
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the 600mL beaker. The water level was brought to 50mL by carefully adjusting the stopcock. 25mL of the prepared HCl solution was placed in a 125mL flask with a .5 to 1 gram piece of Alka-Seltzer. CO2 was allowed to escape then the neck/mouth of the flask were dried. The accurately measured .21 to .28 gram piece of Alka-Seltzer was added to the flask and then quickly stoppered and connected to the rubber tubing so that the CO2 was transferred to the buret. CO2 was allowed to collect for 5 minutes
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best fit. This may be because of some water leaving from the 3-neck round bottom flask as steam‚ when different volumes of salicylic acid solution were being pipetted out. This increased the concentration of salicylic acid in that flask‚ and the value of A obtained would thus be slightly higher than expected. A possible remedy to this could be to pipette the solution quickly above the 5.0mL marking and stopper the flask immediately after. Next‚ carefully reduce the solution in the pipette to the
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