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    Page 9 of 32 - About 316 Essays
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    The purpose of this experiment was to learn techniques to determine the freezing point of a pure benzophenone, a solvent. Furthermore, methods for determining the freezing point depression in relation to the solute, cyclohexanone, concentration were employed in addition to learning what molality is and how it related to the colligative properties being studied. These objectives were achieved by melting both pure benzophenone and benzophenone/cyclohexanone solutions (two solutions with…

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    FT-Ir Analysis Essay

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    Table: 9 FT- IR analysis of methanol extract of M. concanensis leaves S. No Peak values Intensity range Intensity Group assignment Functional groups 1 3972.43 0.0086 Unknown 2 3859.33 0.0412 Unknown 3 3805.79 0.0733 Unknown 4 3396.46 0.9280 Medium N-H stretch Amides, alcohols and amines 5 2987.43 0.2450 Medium C-H stretch Alkanes and acids 6 2946.27 0.2810 Medium C-H stretch Alkanes and acids 7 2912.38 0.2040 Medium C-H stretch Alkanes 8 2834.49 0.3170 Weak C-H stretch Aldehydes and…

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    Betacyanin pigments from beta vulgaris vacuoles were use in this experiment to determine the various effects of diffusion into its surrounding environment: 60%detergent, which is shown in the figures below. The four figures below are a set of data that were collected and analyzed the effects of time, salt concentration and ionic compositions on the rate of diffusion. Both figure one and two show a set of measurements between two different salt concentrations representing their absorbance versus…

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    The purpose of this lab was to perform reduction of ketones by reducing 4-t-butylcyclohexanone with sodium borohydride (NaBH4) to form 4-t-butylcyclohexanol. At the end of this experiment, the infrared spectroscopy was obtain for the final product, 4-t-butylcyclohexanol. The IR graph showed the presence of the desired product, and it also showed if the reaction went to completion or not. In addition, the mass of the final product was obtained to determine the percent yield. To a 5mL conical…

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    Mole Ratios Lab Report

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    Do mole ratios affect the amount of reactant that is produced? This experiment tested why mixing reactants in different mole ratios affected the amount of the product and the amount of each reactant that is left over. To solve the problem, the lab contained reacting sodium bicarbonate(baking soda) and acetic acid(vinegar) in different ratios and seeing if the product changed. The data suggests that the higher ratio of baking soda to vinegar creates the most product. For the ratio…

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    Mystery Liquids Lab

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    In this lab we wanted to identify what the four mystery liquids were using density and their characteristic properties. We were initially given four liquids that were labelled numbers 1- 4, some graduated cylinders, and a scale, but we also knew that the 4 liquids were ethanol, vegetable oil, water, and cyclohexane. Using the mass that we found when we measured the liquid and using only 10 mL of the liquids we were able to calculate the density and easily identify the liquids and see if they…

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    How can we differentiate acids and bases? How do we know if a substance is an acid or a base? There are different methods to discover whether a substance is an acid or a base. One of the methods is by using an acid-base indicator or by identifying hydrogen or hydroxide ions in a substance’s chemical formula. Certain materials such as a plastic template, red litmus paper, blue litmus paper, phenolphthalein, universal indicator, and a pH chart can be used to help us distinguish acids and bases.…

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    Introduction The Objective was to determine the mass percent composition of the mixture using a chemical reaction and stoichiometry mixture Na2CO3 and NaHCO3. To do the lab by using the constant mass. Constant mass is a quantitative chemistry technique where a single chemical species or group reactants is heated with constant weighing until the mass does not change. After heated the Na2HCO3 will undergo a decomposition and Na2CO3 will not undergo reaction. The balanced equation is…

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    Benzimidazol

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    Benzimidazole and its derivatives were synthesized according to the reported literature (Wagner EC et al., 1943). The compounds are benzimidazole ;1-(4-((1H-benzimidazol-1-yl) methylamino) phenyl) ethanone; 2-butyl-1H-benzimidazole; 2-methyl-1H-benzimidazole. The stock solutions are prepared by dissolving the compound in DMSO. Antimicrobial activity was tested by the disc-diffusion method under standard conditions using Mueller-Hinton Agar (MHA) and the antibiotics used as listed below, Table…

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    Rinsing Process

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    Interpretation and Evaluation: Rinsing Process: When performing a volumetric analysis all equipment to be used must be washed with deionised water. This is done in order to remove anything that contaminate your solution and have an effect on the results. It is important that deionised water is used and not regular tap water, this is because tap water could itself contains many unwanted impurities such salts, other solids and bacteria. If these were to contaminate the solutions to be used it…

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