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CHE 233 final exam Questions With Complete Solutions

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biodiesel correct answer: comprised of long-chain FAMES(fatty acid methyl esters) three methods for production of Biodiesel correct answer: -catalyzed transesterification 2. acid-catalyzed transesterification 3. saponification followed by acid-catalyzed transesterification method used in experiment correct answer: base-catalyzed transesterification a-linoleic acid correct answer: 17 carbon chain three double bonds linoleic acid correct answer: 17 carbon chain two double bonds oleic acid correct answer: 17 carbon chain one double bond palmitic acid correct answer: 15 carbon chain no double bonds Tryglycerides correct answer: created by phosphorylated glycerol and enzyme functionalized fatty acid esters alchohol correct answer: used to shift equilibrium to the product Transesterification correct answer: The process that transforms one ester to another when an alcohol acts as a nucleophile and displaces the alkoxy group on an ester. why can't alkaline metal hydroxide be used correct answer: it can hydrolyze the ester produced materials used in Biodiesel lab correct answer: 1. sodium methoxide as catalyst (organic base) 2. methanol 3. tryglycerides of oils oils used correct answer: 1. canola 2. olive 3. vegetable problems with organic bases correct answer: not as efficient as ionic, conversion efficiency not linear analysis of Biodiesel lab correct answer: H-NMR


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