2008_exam_2 - CHM 3120 Exam 2 (Form Code A) October 16,...

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CHM 3120 Exam 2 (Form Code A) October 16, 2008 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 not true? (1) A reaction is favored if ! G is negative. (2) A positive ! S favors a reaction. (3) If Q>K, the reaction must proceed to the right to reach equilibrium (4) A reaction is spontaneous if ! G o is negative. 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 is the titration error. (4) A back titration is, in principle, more accurate than a direct titration. (5) A blank titration involves carrying out the normal titration procedure, but without the analyte. 3. What concentration of Ca +2 must be added to 0.010M oxalate (C 2 O 4 -2 ) to precipitate 99.0 % of the oxalate? K sp = 1.3 x 10 -8 (1) 1.3 x 10 -4 (2) 1.8 x 10 -4 (3) 1.3 x 10 -8 (4) 3.2 x 10 -4 (5) other 4. A beaker contains 250 mL of 0.150 M silver ion.
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2008_exam_2 - CHM 3120 Exam 2 (Form Code A) October 16,...

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