Exam 2 (Blue) - 2008

Exam 2 (Blue) - 2008 - CHEM 188 Spring, 2008 Hour Exam 2...

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CHEM 188 – Spring, 2008 Hour Exam 2 (Blue) March 13, 2008 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 + =  1. In the reaction NH 3 + H 2 O NH 4 + + OH - the Brønsted acids are A. NH 3 and H 2 O B. NH 4 + and OH - C. NH 3 and NH 4 + D. H 2 O and NH 4 + E. NH 3 and OH - 2. Identify an acid-base conjugate pair in the following reaction: H 2 PO 4 - + NH 3 HPO 4 2- + NH 4 + A. H 2 PO 4 - (acid) and NH 4 + (base) B. H 2 PO 4 - (acid) and HPO 4 2- (base) C. NH 4 + (acid) and HPO 4 2- (base) D. HPO 4 2- (acid) and NH 3 (base) E. H 2 PO 4 - (acid) and NH 3 (base) 3. What is the pH (to the correct number of significant figures) of a solution in which the hydrogen ion concentration is 5.00 x 10 –6 M? A. 5 B. 5.3 C. 5.30 D. 5.301 E. 5.3010 1
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4. Which of the following statements is true for a 0.10 M solution of a weak acid , HA? A.
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This note was uploaded on 05/09/2008 for the course CHEM 188 taught by Professor Hierl during the Spring '08 term at Kansas.

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Exam 2 (Blue) - 2008 - CHEM 188 Spring, 2008 Hour Exam 2...

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