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Exam 2 (Early) - 2010

Exam 2 (Early) - 2010 - CHEM 188 Spring 2010 Hour Exam...

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CHEM 188 – Spring, 2010 Hour Exam 2 (Early) March 10, 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 + =  1. In the reaction H 2 CO 3 + H 2 O HCO 3 - + H 3 O + the Brønsted bases are A. H 2 CO 3 and H 2 O B. HCO 3 - and H 2 CO 3 C. H 3 O + and H 2 CO 3 D. H 2 O and H 3 O + . E. H 2 O and HCO 3 - 2. At 25 o C, what would be the concentration of OH - ions in a 0.025 M HCl solution? 3. What is the pH (to the correct number of significant figures) of a solution in which the hydrogen ion concentration is 5.000 x 10 –6 M?
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