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Title: Chapter 18(2) Started: November 1, 2009 6:12 PM Submitted: November 1, 2009 6:35 PM Time spent: 00:23:03 Total score: 9/12 = 75% Total score adjusted by 0.0 Maximum possible score: 12 1. Conjugate Pair 22 Give the conjugate base of H 2 SO 4 . Write it ignoring super and subscripts (so, HPO 4 2- would be HPO42- or bromide would be Br-. .. NOT Br1-) Student Response Value Correct Answer 1. HSO41- 100% Equals HSO4- (100%) Equals HSO41- (100%) Score: 1/1 2. Combined Acid Base 3 Use a table of Ka or Kb values to determine whether K c for the following reaction is less than, equal to or greater than 1 HCO 3 - + F - <=> CO 3 2- + HF Student Response Value Correct Answer Feedback 1. K c = 1 0% 2. K c < 1 100% 3. K c > 1 0% Score: 1/1 3. Acid Strength Trends 3 Select the weaker acid from each of the following pairs: I. HI or HBr II. H 3 AsO 3 or H 2 SeO 3 III. HNO 3 or HNO 2 Student Response Value Correct Answer Feedback 1. I. HBr II. H
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