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Title: Chapter 18(2) Started: November 1, 2009 11:41 PM Submitted: November 1, 2009 11:59 PM Time spent: 00:17:38 Total score: 9/12 = 75% Total score adjusted by 0.0 Maximum possible score: 12 1. Conjugate Pair 6 Give the conjugate acid of H 2 O. Write it ignoring super and subscripts (so, HPO 4 2- would be HPO42-and bromide would be Br- NOT Br1-)) Student Response Value Correct Answer 1. H3O1+ 100% Equals H3O+ (100%) Equals H3O1+ (100%) Score: 1/1 2. Combined Acid Base 2 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 NH 4 + + HCO 3 - <=> H 2 CO 3 + NH 3 Student Response Value Correct Answer Feedback a. K c = 1 0% b. K c < 1 100% c. 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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