Acetic anhydride

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  • Similarities Between Grignard Reagent And Phenylmagnesium Bromide

    In this experiment, a Grignard reagent, phenylmagnesium bromide, reacted with a ketone, acetophenone, to produce 1,1-diphenylethanol. The experimental product was relatively pure as its melting point was determined to be between 78 and 80.7°C. The value from literature suggests that the melting point is between 78 and 82°C (chemspider.com). However, the percent yield for this experiment was not very high, at only 57 percent. The low yield for this lab was most likely due to the low…

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  • Unknown Carboxylic Acid Lab Report

    Based on the NMR tests that were run, the results were very consistent to the NMRs of isopentyl acetate. Based on these charts, we concluded that our unknown alcohol was isopentyl alcohol and the unknown carboxylic acid was acetic acid. The boiling point of the experimental product was 140.2°C, which supports the conclusion of isopentyl acetate because that has a boiling poing of 142°C. The main source of error for this week’s lab was leaving the product to dry for 2 full weeks…

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  • Multip Ph Lab Report

    Scientists use a scale to measure how acidic or basic a liquid is. That scale is called a pH scale. The pH scale is a number from zero to fourteen. Accordingly, zero to seven liquids are considered acid. However, seven is considered a neutral, like distilled water. Therefore, eight to fourteen the liquids are considered basic. For instance, a pH of two is going to be an acidic liquid. Thus, a pH of twelve would be measured as a basic liquid. Additionally, a strip of litmus paper will…

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  • 6.03 Calorimetry Lab Report Conclusion

    The purpose of this experiment was to determine the identity of nine solutions using the results of reacting pairs of solutions in an organized systematic manner. Known solutions were used on the first day. The second day, the solutions were placed in code-labeled bottles. The reactions from the previous day were then used to help identify which solutions were which, by closely monitoring which unknown solutions mixed with other unknowns and how they reacted, such as: color changes,…

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  • Lipid Chromatography Lab Report

    In the biomolecule lab, we conducted the lipid chromatography experiment to separate a mixture of biomolecules from lipids. If a positive test is conducted by the end of the experiment, there should be smudges aligned vertically on the chromatography paper, or silica gel strip, indicating the separation of different lipid molecules that were present in the substance. In contrast, if a negative test is conducted there would be no smudges aligned vertically on the chromatography paper. Substances…

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  • Identifying Acid Values

    measure of the strength of an acid. If the value of Ka is high, the said acid s largely dissociated, making the acid strong. However, when the value of Ka is small, the little amount of acid is dissociated, making the acid weak. In the experiment, acetic acid (HOAc), is shown to have a computed Ka of 1.1148 x 10-5. It has a very little value meaning it is considered as a weak acid. Likewise, another measure of equilibrium, the solubility product constant (Ksp) was determined in the experiment.…

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  • Magnesium Synthesis

    Magnesium (1.5 g) was stirred vigorously, to combat oxidation and pulverize the by-product magnesium sulfate, in a 250 mL round bottom flask for 5 to 10 minutes, then fit with reflux apparatus – including CaCl2 Drying Tube, 125 mL Dropping funnel, Claisen adapter, and thermometer adapter – and add anhydrous ethyl ether (40mL) through the dropping funnel. Bromobenzene (3mL) and Anhydrous Ethyl Ether (15mL) was added to the reaction flask through the dropping funnel dropwise and in halves. Reflux…

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  • Condensation Of Sulfuric Acid Lab Report

    The purpose of this lab was to perform the condensation of acetic acid with isopentyl alcohol in the presence of sulfuric acid. Isopentyl acetate was formed from this reaction and this compound has the distinct smell of bananas. This reaction is known as Fisher Esterification. From the final product, the final mass was used to calculate the percent yield. Finally, the IR spectrum was obtained from the final product in order to determine if the reaction went to completion or not. To a 5mL…

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  • Purification Of Esters Lab Report

    alcohol. 95% ethanol and glacial acetic acid are synthesized with the presence of concentrated sulfuric acid using Fischer Esterification method. It is a method which esters are obtained by refluxing the parent carboxylic acid with the appropriate alcohol with an acid catalyst. The equilibrium can be driven to completion by using an excess of either the alcohol or the carboxylic acid, or by removing the water as it forms. The reaction between ethanol and glacial acetic acid formed ethyl…

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  • K3feb Vs Fecl3

    The results of the experiment were that the product created to determine the coefficients of the coordination complex, KaFeb(ox)c ∙ dH2O. On day 1, K2C2O4 ∙ H2O and FeCl3 ∙ 6H2O were mixed together forming a green solution (Figure 1). The green solution was set aside for 45 minutes in the dark to allow crystals to form (Figure 2). The crystals formed slowly at first, but then progressed along the way (Table 1). After the product rested in an ice bath, the solid crystalline product was filtered…

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