chem 2 test 3 - View Attempt Page 1 of 7 View Attempt 1 of...

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View Attempt 1 of 1 Title: Exam 3 Started: April 22, 2008 5:53 PM Submitted: April 22, 2008 7:12 PM Time spent: 01:18:12 Total score: 20/20 = 100% Total score adjusted by 0.0 Maximum possible score: 20 1. Calculate the hydronium ion concentration in a solution that is 0.019 M HBrO and 0.056 M NaBrO. GIVE YOUR ANSWER TO 1 DECIMAL PLACE AND IN SCIENTIFIC NOTATION. K a of HBrO is 2.0 x 10 -9 . Student Response Value Correct Answer Answer 6.8E-10 100% 6.8E-10 (6.8 × 10 -10 ) Score: 1/1 2. Calculate the pOH of a solution that is 0.093 M C 6 H 5 COOH and 0.016 M C 6 H 5 COONa. K a of C 6 H 5 COOH is 6.5 x 10 -5 . Student Response Value Correct Answer Answer 10.58 100% 10.58 Score: 1/1 3. Determine the pH at the equivalence (stoichiometric) point in the titration of 47.8 mL of 0.724 M CH 3 NH 2 by 0.996 M HNO 3 . The K b of CH 3 NH 2 is 3.6 x 10 -4 . Student Response Value Correct Answer Answer 5.47 100% 5.47 Score: 1/1 4. Calculate the pH during the titration of 25.5 mL of 0.602 M dimethylamine, (CH 3 ) 2 NH with 0.296 M HCl after 12.6 mL of the acid have been added. Page 1 of 7 View Attempt 4/26/2008 http://scholar.uh.edu/webct/urw/lc179937921.tp179937934/ViewStudentAttempt.dowebct. ..
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K b of dimethylamine = 5.4 x 10 -4 . Student Response Value Correct Answer Answer 11.23 100% 11.23 Score: 1/1 5. Calculate the pH during the titration of 20.0 mL of 0.25 M HBr with 0.25 M KOH after 29.3 mL of the base have been added. Student Response Value Correct Answer Answer 12.67 100% 12.67 Score: 1/1 6. Determine the volume in mL of 0.606 M NaOH(aq) needed to reach halfway to the
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chem 2 test 3 - View Attempt Page 1 of 7 View Attempt 1 of...

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