Midterm 1 sect4 Sp16 Form A.docx - CHM 123.04 General...

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CHM 123.04 General Chemistry, Spring 2016 __________________________________ Dr. Jodye Selco Name Midterm 1, Form A This exam has 7 pages (including this one - the last page is a periodic table) and 15 questions in total. Be sure to count the numbers of pages before beginning this exam. Be sure to show all work. Make sure that your answers have the correct number of significant digits! Useful Information: [A] t = -kt + [A] 0 ; ln[A] t = ln[A] 0 – kt; k t 1/2 = ln(2); R = 8.314 J/mol K kt ] A [ 1 ] A [ 1 0 ; 2 1 2 1 1 1 ln T T R E k k a ; pOH = pK b + ( [HA] [ A - ] ) ; pH = pK a + ( [ A - ] [HA] ) ; Section 1 - Multiple Choice (circle correct answer - 10 points each) 1. Which of the following statements is TRUE ? a) At the equivalence point [HA] = [A - ] during the titration of any weak acid. b) At the equivalence point during a titration, the pH is not always 7. c) An acid-base indicator is not pH sensitive. d) A titration curve is a graph of pH versus the [base]/[acid] ratio. I think this because:
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