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ASS1 - CHEMISTRY HTK ASSIGNMENT 1 1 Draw Lewis structures...

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Unformatted text preview: CHEMISTRY HTK ASSIGNMENT 1 1. Draw Lewis structures of the simplest ethyl derivatives of each of the following functional groups: a) d) g) J) m) bromide b) alcohol c) ether epoxide e) aldehyde t) ketone carboxylic acid h) ester of acetic acid i) acid chloride amide k) anhydride 1) nitrile amine 11) an oc—amino acid 2. Define resonance. Draw Lewis structures of the following species: a) d) 3. a) b) 4. a) b) SCN‘ b) C6H6 c) C2H5N01- CGHSCOO” e) CHZN2 (diazomethane) Define isomerism. Explain the difference between constitutional isomers and stere01somers, 111ustrat1ng your answer with examples. How do isomers differ from conformers? Briefly describe the three main types of intermolecular force. Sketch a diagram of the most important intermolecular forces that exist in an aqueous solution of methanol. 5. Ethanol and ethanal are equally soluble in water, but the boiling point of ethanol is much higher than that of ethanal. Explain this observation. 6. Explain what a homologous series is, and What its chief characteristics are. 7. a) b) Define i) an acid ii) a base iii) a nucleophile iv) an electrophile. The hydroxide ion is a base and a nucleophile. Explain this statement, illustrating your answer with equations representing appropriate reactions. 8. Explain what i) substitution reactions ii) addition reactions iii) elimination reactions are, giving one example of each. Additional Problems: Solomons and Fryhle, 7th ed. p.46 Nos.: 1.20; 1.23; 1.24; 1.25; 1.26; 1.27 p. 85 Nos: 2.19; 2.21; 2.22; 2.26 ...
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