Quiz10A - 1 CHM 2123, Quiz #10: Hydrolysis of Esters, Fats...

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1 CHM 2123, Quiz #10: Hydrolysis of Esters, Fats and Detergents Assigned: November 23, 2006 Due: November 27, 2006, before 5 pm MARKING SCHEME 1. Could acidic conditions be employed to determine the neutralization equivalent? Justify your answer with equations and explain briefly. (3 points) R O O R' + NaOH R O O + R'OH Na R O O R' + H 2 O H + R OH O + R'OH It would not be possible to determine the neutralization equivalent under acidic conditions. The main reason for this would be that since the acid catalyzed hydrolysis of an ester (H 2 O, H + ) is reversible (at equilibrium), it would likely not go to completion and the value obtained would therefore be inaccurate. 2. Explain how the determination of the neutralization equivalent can provide useful information towards the determination of an unknown structure, for example. (2 points) The neutralization equivalent gives us the quantity of NaOH (in mols) necessary to completely hydrolyze a known quantity of an ester (in g). The value obtained is in g / mol
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Quiz10A - 1 CHM 2123, Quiz #10: Hydrolysis of Esters, Fats...

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