CHE 233 final exam| 103 Questions | With Complete Solutions

Determine the limiting reagent and the excess reagent for the biodiesel lab Excess reagent _____________ limiting reagent _____________________ correct answer: methanol, triglyceride Complete the statements below by matching the following saturated fatty acids have ______ __________ bonds unsaturated fatty acids have _____ ____________ bonds correct answer: no C=C, one C=C The addition of water to sodium methoxide produces ___________ _______________ and _________________ correct answer: sodium hydroxide, methanol After completion of the experiment, where do you dispose of FAMEs? a. sharp objects waste container b. organic liquid hazardous chemical waste container c. sink d. solid hazardous chemical waste container e. organic solid liquid hazardous chemical waste container f. aqueous solid liquid chemical waste container g. regular trash container h. broken glass waste container i. aqueous liquid hazardous chemical waste container correct answer: b TRUE or FALSE: The excess reagent in the biodiesel lab is required to shift the equilibrium to the right correct answer: true How will you characterize your product in the biodiesel lab? What specific differences will you be looking for compared to the starting material? (Multiple answers) a. intensity of peaks will change b. disappearance of CH2 peak due to triglyceride c. IR d. appearance of peak due to OCH3 e. H NMR spectroscopy correct answer: b, d, e a type of fuel synthesized by breaking down lipids from natural sources correct answer: biodiesel fatty acid molecules with single bonds between all carbons correct answer: saturated fatty acid a chemical reaction in which an ester is converted into a new type of ester correct answer: transesterification fatty acid molecules with single bonds between some carbons and double bonds between some carbons correct answer: unsaturated fatty acid a molecule made up of glycerol connected to three fatty acid chains correct answer: triglyceride During the FAMEs synthesis, a mixture will be added to a vial and two layers will form. Identify the components of each layer top: ____________ with ______________