Exam 2 (Blue) - 2010

Exam 2 (Blue) - 2010 - CHEM 188 Spring, 2010 Hour Exam 2...

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CHEM 188 – Spring, 2010 Hour Exam 2 (Blue) March 11, 2010 Instructions: Your scantron answer sheet must show your NAME , 7-DIGIT KU ID NUMBER , and LAB SECTION . (Begin these entries at the LEFT end of the space provided.) In answering the questions, be careful to fill in the corresponding circles on the answer sheet according to the number of the question on the exam. USE A SOFT (No. 2) PENCIL . Useful information: Henderson-Hasselbalch eqn. [acid] base] [conj. log pK pH a + = Quadratic formula: a ac b b x 2 4 2 - ± - = 1. Identify an acid-base conjugate pair in the following reaction: HClO + CH 3 NH 2 CH 3 NH 3 + + ClO - A. HClO (acid) and CH 3 NH 2 (base) B. HClO (acid) and CH 3 NH 3 + (base) C. CH 3 NH 3 + (acid) and CH 3 NH 2 (base) D. CH 3 NH 3 + (acid) and ClO - (base) E. CH 3 NH 2 (acid) and ClO - (base) 2. What is the hydroxide ion concentration (to the correct number of significant figures) in a solution whose pOH is 2.9087? A. 1 x 10 –3 M B. 1.2 x 10 –3 M C. 1.23 x 10 –3 M D. 1.233 x 10 –3 M E. 1.2331 x 10 –3 M 3. Which of the following statements is true for a 0.10 M solution of a weak acid , HA? A. The pH = 1.00 B. [H + ] = [HA] o C. [H + ] > [A - ] D. all of the above E. none of the above 1
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4. Which answer correctly lists all of the strong acids from the following list? 1.
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Exam 2 (Blue) - 2010 - CHEM 188 Spring, 2010 Hour Exam 2...

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