2009_exam_2 - CHM 3120 Exam 2 (Form Code A) October 15,...

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CHM 3120 Exam 2 (Form Code A) October 15, 2009 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. Which of the following statements is true? (1) positive. (2) A negative (3) If Q>K, the reaction must proceed to the left to reach equilibrium (4) o is positive. 2. Which of the following statements about titrations is not correct?: (1) The equivalence point is obtained by adding the stoichiometric amount of titrant to the analyte solution. (2) The endpoint is marked by a sudden change in some physical property (e.g., color) of the solution. (3) The difference between (1) and (2) above may be insignificant. (4) A back titration is, in principle, less accurate than a direct titration. (5) In the titration of a weak acid with a strong base, at the equivalence point pH = pK a 3. At what pH will magnesium hydroxide begin to precipitate from a 0.05M magnesium sulfate solution? K sp for magnesium hydroxide= 1 x 10 -11 (1) 9.15 (2) 11.21 (3) 4.85 (4) 12.4 (5) other 4. What is the activity coefficient for Ca +2 in a 0.01 M solution of Ca(ClO
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This note was uploaded on 03/31/2010 for the course CHM 3120 taught by Professor Harrison during the Spring '08 term at University of Florida.

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2009_exam_2 - CHM 3120 Exam 2 (Form Code A) October 15,...

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