Web Quiz 6

Web Quiz 6 - http://chemmac1.usc.edu/cgi-bin/randquiz.cgi 1...

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Unformatted text preview: http://chemmac1.usc.edu/cgi-bin/randquiz.cgi 1 of 4 Web Quiz You can login to this page multiple times but you cannot take the quiz more than once.. Submit your answer for grading by Clicking on the "Grade Answers" button at the bottom of the page only when you are sure of your answers. Question # 1 Calculate the pH of a 0.2 M solution of NH 4 Cl. ( K b of NH 3 = 1.8 x 10-5 ) A. 2.7 B. 5 C. 7 D. 9 E. 11.3 Question # 2 Calculate the pH of a 0.10 M solution of pyridine (C 5 H 5 N; K b = 1.7 x 10-9 ): A. 8.15 B. 4.88 C. 9.12 D. 12.33 Question # 3 Calculate the pH of a 0.10 M solution of Ca(OH) 2 . A. 13.3 B. 13.0 C. 0.7 D. 1.0 http://chemmac1.usc.edu/cgi-bin/randquiz.cgi 2 of 4 Question # 4 For the stepwise dissociation of aqueous H 3 PO 4 , which of the following is not a conjugate acid-base pair? A. HPO 4 2- and PO 4 3- B. H 3 PO 4 and H 2 PO 4- C. H 2 PO 4- and HPO 4 2- D. H 2 PO 4- and PO 4 3- Question # 5 The pH of a 1.0 M sodium acetate solution is: A. 7 B. greater than 7.0 C. less than 7.0 less than 7....
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This note was uploaded on 08/21/2008 for the course CHEM 105BL taught by Professor Warshel during the Spring '07 term at USC.

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Web Quiz 6 - http://chemmac1.usc.edu/cgi-bin/randquiz.cgi 1...

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