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- (30)(64) What is the major organic product for the following sequence?(20, 3) Draw a structural formula for the product of the reaction shown. Use the wedge/hash bond tools to indicate stereochemistry where it exists. Show stereochemistry in a meso compound. In cases where there is more than one answer, just draw one.
- (7) (8) H3C OH H + CH3OH - H₂O HCI catalyst + 2 CH3CH₂OH - H₂O HCI catalyst(Q16) What is the pH of a solution that is 0.737 M in ethylammonium chloride (CH3CH2NH3CI)? The Kb of ethylammonia (CH3CH2NH2) is 5.6 x 10-4.5. Lactose, one of the principal sugars found in milk, is an extremely common disaccharide. a. (i) Draw the structure of ß-lactose and briefly (ii) explain why it is classified as a disaccharide. (4 points): b. (i) Define the term glycoside and (ii) explain how it relates to the structure of ß-lactose. (4 points): c. (i) Explain why lactose does form a silver mirror when reacted with Tollen's reagent but sucrose does not. As part of your answer, (ii) identify the key reactive component of Tollens' reagent. 3.
- 8. (3 pts.) Draw the tripeptide Phe-Gly-Phe in a zig-zag format. Ensure to clearly show all stereochemical information. 0.5 Hq (d) 0.3 Hq(9.) Predict the products of this disaccharide hydrolysis reaction: CH₂OH OOH CH2OH OH Acid Hydrolysis OH OH OH H3O+H CH3 CH3 H3C- H3C- CH3 CH3 (1) a. Identical Enantiomers Diastereoisomers Structural isomers piinoo etuload CH3 Et H Et H CH3 Et H3C H. b. ČH3 Et 翠 Identical Enantiomers Diastereoisomers Structural isomers