A_B Practice Test6

A_B Practice Test6 - CHEM 1202 Sec 2 EXAM 2 Acid/Base...

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CHEM 1202 Sec 2 Fall 2010 EXAM 2 Acid/Base Equilibria Dr. Kolniak FORM 1 IMPORTANT: On the scantron sheet fill in your name ( LAST name first) and ID number in the box and bubble in the corresponding letter and number. Ask a question , if you are not sure about what to do or if you are confused about the content of the problem. Select the very best answer (7 pts each or 6.25%). Constants: Kw = 1 x 10 -14 1. Calculate the pH of a 4.5 M generic weak base, B , solution. K b = 4.0 x 10 -5 . (CH 3 ) 2 NH (aq) + H 2 O (l) (CH 3 ) 2 NH 2 + (aq) + OH - (aq) a. pH = 1.872 b. pH = 3.745 c. pH = 10.25 d. pH = 13.35 e. pH = 12.13 2. Given the following reaction, which statement is true in the forward direction? CO 2 -2 (aq) + H 2 O (aq) HCO 2 - (aq) + HO - (aq) a. CO 2 -2 is the acid and HCO 2 - is its conjugate base. b. CO 2 -2 is the base and HCO 2 - is its conjugate acid. c. H 2 O is the base and HO - is its conjugate acid. d.
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A_B Practice Test6 - CHEM 1202 Sec 2 EXAM 2 Acid/Base...

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