calculate the molar mass)‚ and compare the results to the accepted value for the analysis of accuracy. This can be achieved by substituting the mass of the substance over the molar mass of the substance for “n”: m/M=n. The liquid heated to a gas is methanol‚ which has an accepted value for molar mass of 32.05g/mol. Materials: 500 ml Erlenmeyer flask 1000 ml beaker Hot plate Aluminum foil Needle Unknown liquid sample (CH3OH) Ring stand and beaker clamp Procedure: 1) Prepare 1000 ml
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10. Add 3mL methanol and boiling stone. 11. Heat to boil and add dropwise methanol till it dissolves solid. 12. Cool in ice and filter‚ was with 30:7 ratio mix of methanol and water. 13. Determine percent recovery. Chemicals Used 1. Phthalic Acid 2. Benzoic Acid 3. Naphthalene Results | Melting Point (oC) | Weight (g) | % Recovery | Phthalic Acid | 175.5 | .35 | 67.5 | Benzoic Acid with H2O | 117.5 | .045 | 95 | Benzoic Acid with Methanol | 118 | .12 | 24
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water and methanol‚ the ratio of water to methanol must be determined for this to occur. Therefore‚ 1 mL of methanol will be added to the crude product in a test tube that is then taken to a boil in a water bath. Once boiling‚ water is added dropwise until the solution turns cloudy. The water must be added at the same temperature as methanol. Precipitate should form around the droplet of water added that then dissolves. Once the precipitate stops dissolving. At this point if methanol is added it
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Heats of Combustion of Alkanols Aim: To perform a first-hand investigation to determine the heats of combustion of selected alkanols. Hypothesis: It was predicted that methanol would have the highest molar heat of combustion‚ decreasing as the chains become longer. Equipment: • Three spirit burners containing methanol‚ ethanol and propan-1-ol respectively • Electronic scales • Water • 100ml measuring cylinder • Retort stand and boss-head clamp • Copper beaker • Thermometer Method:
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source of energy and provide essential lipid nutrients. This experiment determined the components of each eluents. Lipids were based upon their polarity using column chromatography. The eluents used were 9:1 mixture of petroleum ether:ethyl ether‚ 5% methanol in dichloromethane and dichloromethane:methanol:water (1:3:1). The results obtained were analyzed and it showed that the the lipids are eluted by increasing polar solvents. The lipids present in the crude extract were triacylglycerol‚ cholesterol
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Introduction • The problem we are studying was to determine the cellular damage of various concentrations of propanol‚ ethanol‚ methanol‚ NaCL‚ and sodium dodecyl sulfate henceforth known as SDS on Beta vulgaris to ultimately distinguish the ability of each solution to permeate the membrane of the Beta vulgaris. • Beta vulgaris contains a beta cyanin which is a water-soluble red-pigment‚ which remains in a healthy vacuole surrounded by the tonoplast membrane. When we damage the tonoplast membrane
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ABSTRACT This experiment was conducted to synthesize methyl benzoate form benzoic acid and methanol by using the Fischer esterification method. The Fischer exterification technique is utilized in the academic and industrial settings due to the simplified synthesis and safety parameters of the overall reaction. Both benzoic acid and methanol are relatively cheap to obtain from a commercial source as well as being easy to store with a relatively long shelf life. The Fischer esterification method is
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Lab report: Viscosity of Liquids Introduction This experiment focuses on measurements of different trials of various concentrations. The collected data is used to compare and contrast to the ideal binary solutions and their components. The Ostwald viscometer is a useful laboratory equipment to measure the viscosities of many binary solutions. Background Molecules have the ability to slide around each other‚ result in a flow. Such a flow has a resistance called viscosity. Microscopically
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cooling; after which the mixture is poured onto ice. The solid product will then be isolated by filtration and recrystallized from methanol‚ in which it is very soluable. A.) Materials: 1) .6mL of concentrated sulfuric acid 2) .30g of methyl benzoate 3) Mixture of .2mL of concentrated sulfuric acid and .2 mL of concentrated nitric acid 4) Ice 5) .2 mL ice cold methanol B.) Procedure in Brief: 1) In a 10 x 100 mm reaction tube add .30g of methyl benzoate and .6 mL of concentrated sulfuric
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the retest used the most efficient and exact method. In the “Volatile Organics” experiment‚ methanol is interpreted as the “unknown waste.” This is displayed through Figure 2‚ where the retention rate is 1.275 minutes and its peak signal is 1.4 mV. The range for methanol due to its similar voltage and retention time‚ when comparing Figure 2a and 2b. Because these chemical mixtures contain acetone‚ methanol‚ and 2-butanone‚ the simplest way to determine the volatility of these chemicals is through
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