CHM 3120 Exam 1 2011 Key

CHM 3120 Exam 1 2011 Key - CHM 3120 Exam 1 (Form Code A)...

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CHM 3120 Exam 1 (Form Code A) September 15, 2011 Instructions: On your scantron sheet enter your name, UF ID number (start on the first space and leave the last space blank), and Form Code (see above). This exam consists of 20 multiple choice questions each worth 10 points for a total maximum of 200 pts. You may retain your exam sheet. Turn in only the scantron. Bubbling errors of any kind will count as an incorrect response or result in the loss of points. 1. In Analytical Chemistry, we often use calibration curves. Which of the following statements is true concerning calibration curves? (A) Calibration curves require a minimum of three points for accurate results (B) The slope of a calibration curve is a measure of a method’s sensitivity (C) The y-intercept must be close to zero for reliable results from a calibration curve (D) Straight line calibration curves (R 2 >0.995) are required for accurate results 2. The salinity of the Great Salt Lake was measured to be 19 parts per thousand sodium chloride. Calculate the molarity of the sodium ion in the Great Salt Lake. (A) 0.82 molar (B)0.46 molar (C) 2.3 x 10 -2 molar (D) 3.2 x 10 -1 molar (E) other 3. I indicated some outstanding Analytical Chemistry programs and scholars. Which of the following does not combine a program and individual from the lists? (A) Michigan; Bob Kennedy (B) Illinois; Sam McCoy (C) Texas; Jenny Broadbelt (D) Florida; Weihong Tan 4. An analytical procedure required the preparation of a solution containing 100 ppm chromium. How many grams of potassium dichromate (K 2 Cr 2 O 7 ) would be required to prepare 500 mL of this solution? (A) 0.2829 grams
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CHM 3120 Exam 1 2011 Key - CHM 3120 Exam 1 (Form Code A)...

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