100404 1032 exam 3 key

100404 1032 exam 3 key - CHEMISTRY 1032 MICHEL EXAM III...

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CHEMISTRY 1032 – MICHEL EXAM III – Spring 2010 Name _______________________ TUID ____________________ Signature __________________________ Show all of your work where requested. No graphing or memory accessible calculators are allowed at your examination desk. No cells phones or PDAs are allowed on your persons. Violation of these department rules will be brought to the attention of the Chemistry Department Chairman, the Dean and the Provost, and may result in significant disciplinary action for violation of university standards of academic integrity. Read the problems carefully. Give numerical answers to the correct number of significant figures. In order to earn partial credit, work must be legible. The numbers in the [ ] are the point values for each question. Check your work! Useful information is to be found on page 9. 1
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1. [16] There may be zero, one, two, three, or four correct answers to parts (a) , (b) and (c) . Circle your answer(s): (a) Which of the following is a strong base? B(OH) 3 AlF 3 CaO NH 2 OH (b) Which of the following, dissolved in water, gives an acidic solution? C 2 H 5 NH 3 Cl NaCl CaCl 2 CH 3 CO 2 H (c) Which of the following, dissolved in water, gives a basic solution? (C 2 H 5 ) 2 NH NaF CrCl 3 KNO 3 (d) [5] Write a balanced equation to show what happens when the F anion hydrolyses with water. Write “acid” or “base” under all reactants and products and link together the conjugate pairs, as shown in class and in the text.
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