quiz1-2003-2004

quiz1-2003-2004 - (1) 3-Ethyl-1,1-dimethylcyclohexane (2)...

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v1.1 Quiz #1, CHEM 111, Fall Semester, 2003/2004 Student Name: Student ID #: Section: Note: You are required to complete all questions independently. Reference materials and textbook are prohibited. Total marks for this quiz is 50 points. Question 1: Draw the Lewis structure for thionyl chloride SOCl 2 and calculate the formal charges on S and O atoms ( d orbitals for S are not considered here). (10 points) Answer: Question 2: (1) Draw two isomeric molecules for the formula, CH 3 NO 2 . (6 points) (2) For each isomer, draw all valid resonance structures and indicate the more stable resonance form. (6 points) Answer: (1) (2) Question 3: Draw the structures of the following molecules. (6 points)
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Unformatted text preview: (1) 3-Ethyl-1,1-dimethylcyclohexane (2) 2-Cyclobutylpentane Answer: (1) (2) Question 4: Write equations for the following acid-base reations. Use the given pKa values to predict the following reactions likely occur from left to right direction? (12 points) + HCOOH CN (1) + CH 3 OH NaNH 2 (2) pK a : HCOOH = 3.76; CH 3 OH = 15.5; HCN = 9.22; NH 3 = 33 Answer: (1) (2) Question 5: For BF 3 : (1) Indicate hybridization of B and the shape of the molecule; (4 points) (2) Draw the structure of BF 3 and indicate the polarity of each B–F bond. (4 points) (3) Estimate the dipole moment of BF 3 (2 points) Answer: (1) (2) (3)...
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This note was uploaded on 02/27/2010 for the course CHEM CHEM111 taught by Professor Dai during the Fall '06 term at HKUST.

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