Chemistry – Heats of combustion. To determine the heats of combustion of selected alkanols and to use this information to determine the heat of combustion for a longer chain alkanols. Formula ΔH=-mCΔT Heat of combustion ΔH/n = molar heat of combustion. Materials -100 degrees thermometer -glass stirring rod -aluminium beaker -electronic balance -bosshead and clamp -retort stand Method 1) Set up the apparatus as shown above. 2) Measure the weight of aluminium can 3) Use the
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of an Ethanol Using Fractional Distillation Lab Report Abstract: This experiment aimed to separate the components of a mixture using Fractional Distillation. A volume of 28.0mL of a mixture including ethanol was heated until the temperature reached 78.0 C. Approximately 1.0mL of distillate was collected between 78.0 – 84.0 C. Percent composition by weight of the 1.0mL sample was determined to be 95% ethanol. By careful and accurate techniques‚ a high percent composition of ethanol was achieved
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is Glycine. 2) Finding the concentration of a known solution Table 1.2: Table used for the preparation of the calibration curve used to find the concentration of alcohol in a wine. 0.2mL of each sample were taken and placed in the Osometer. Ethanol sample (g EtOH/100mL) | Osmolality (mOsm/kg H2O) | 5.117 | 109 | 7.984 | 181 | 11.13 | 242 | 14.01 | 307 | 18.31 | 404 | Wine tested: Piesporter (White) 9.0% by volume. Table 1.3: Table showing the results for the osmolality of a sample
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Yeasts’ capability of undergoing ethanol fermentation‚ its ability to ferment other sugars and artificial sweeteners‚ and how lactase influences yeasts ability to use lactose as a food source Kristina Naydenova Father Michael Goetz Purpose Part A: To investigate whether yeast has the ability to ferment glucose to produce carbon dioxide gas and ethanol. Part B: To investigate whether yeast has the ability to ferment other sugars and artificial sweeteners and how lactase influences their
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Try one Try two Substance Absorbance Substance Absorbance 4ml of water‚ 0 ml of ethanol 0.0000 4ml of water‚ 0 ml of ethanol 0.000 3ml of water‚ 1 ml of ethanol 0.125 3ml of water‚ 1 ml of ethanol 0.058 2 ml of water‚ 2ml of ethanol 0.147 2ml of water‚ 2ml of ethanol 0.087 1ml of water‚ 3ml of ethanol 0.153 1ml of water‚ 3 ml of ethanol 0.099 0 ml of water‚ 4ml of ethanol 0.175 0ml of water‚ 4ml of ethanol 0.139 Mouthwash without alcohol 0.178 Mouthwash without alcohol 0.503 Blue mouthwash
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the absorbance. This experiment incorporated Beer’s Law and is focused on determining the stress that various alcohols have on biological membranes. Using five solutions of differing alcohol concentration for each of the three alcohols; methanol‚ ethanol‚ and 1-propanol and a small slice of beet‚ the stirred solution was placed into a plastic cuvette and then into a spectrophotometer and the absorbance of alcohol solutions were determined in order to conclude which alcohol and concentration of alcohol
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experiment was to observe how the change in solvent polarity affects the rate and to determine the kinetics of a solvolysis reaction. In this experiment‚ we used 1-chloro-1-phenylethane in acetone in one reaction with 50% ethanol-50% water and in another reaction with 40% ethanol-60% water. To monitor he rate of reaction‚ we would need the concentration of the alkyl chloride at the beginning of the reaction and at a time t‚ but since we did not determine the concentrations‚ we monitored the rate
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markers are non-polar substances‚ so it can be easily dissolved by non-polar solvents. Statement of purpose We would like to know whether permanent marker ink is removable by any of the solvents we are going to use in our experiment‚ which are ethanol‚ water‚ acetic acid‚ and soap water. We would also like to know whether the pH scale of a solvent or whether they are polar or non-polar substances can affect the result of
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standFilter funnelBunsen‚ tripod and gauze matWatch glassGlass rodBeakers (two 100mL)Graduated cylinder (25 mL)Filter paper (Whatman No. 1—three 12.5 cm sheets)Sodium chloride/charcoal mixture (4 g)Sodium chloride/copper(II) chloride mixture (8 g)Ethanol (25 mL)Distilled waterBoiling chipProcedureA Separation of a Sodium Chloride and Charcoal Mixture#1 Place 4 g of the salt/charcoal mixture in a 100 mL beaker and add about 15 mL of distilled water. Stir the mixture for about two minutes to allow the
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The aim of this experiment is to investigate the combustion of various alcohols. The alcohols will be burnt to heat up a test tube of water‚ I aim is to find out how much energy is produced when burning the following alcohols: Methanol‚ Ethanol‚ Propanol‚ Butanol‚ and Pentanol. Any form of burning is an exothermic reaction (heat is given out)‚ this means that the reactants energy is higher than that of the product. Alcohols react with oxygen in the air to form water and carbon dioxide
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