Exam 2 Spring 2011

Exam 2 Spring 2011 - CHM 2046 EXAM 2 C.R. MARTIN FORM CODE...

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CHM 2046 EXAM 2 C.R. MARTIN FORM CODE A 03/01/2011 1. What are the five main branches of chemistry? (a) Theoretical, Biomedical, Surface, Analytical and Nano-chemistry (b) Analytical, Inorganic, Organic, Physical and Biochemistry (c) Surface, Analytical, Inorganic, Organic and Physical Chemistry (d) Biomedical, Surface, Analytical, Biochemistry and Nano-chemistry (e) Theoretical, Biomedical, Analytical, Biochemistry and Nano-chemistry 2. What are the main branches of analytical chemistry? (a) Wet chemical and instrumental methods (b) Qualitative and physical methods (c) Qualitative and quantitative analysis (d) Volumetric and instrumental methods (e) Physical and biological methods 3. The compound aniline, C 6 H 5 NH 2 , is weakly basic in aqueous solution. In which solvent would it be a strong base? (a) CH 3 OH (b) CH 3 CH 2 OH (c) CF 3 CO 2 H (d) NH 3 (l) (e) CH 3 (CH 2 ) 4 CH 3 4. Use the following information to choose an appropriate indicator for the titration of 0.10 M CH 3 NH 2 with 0.10 M HCl (K b of CH 3 NH 2 = 4.4 x 10-4). Acid-base indicator approximate pH range (a) thymol blue 1.1-2.9 (b) 2,4-dinitrophenol 2.5-4.0 (c) alizarin 5.5-7.2 (d) phenolphthalein 8.0-10.0 (e) alizarin yellow R 10.0-12.0 In answering Questions 5 and 6, consider the following titration curve 5. Which one of the following combinations does the titration curve represent? (a)
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Exam 2 Spring 2011 - CHM 2046 EXAM 2 C.R. MARTIN FORM CODE...

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