Exam3 - EXAM 3 1. Determine the pH of a solution in which...

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EXAM 3 1. Determine the pH of a solution in which 30.0 mL of 0.1 M aqueous morphine (K b = 7.40 x 10 -7 ) has been titrated with 20.0 mL of 0.1 M HNO 3 (aq). Student Response Value Correct Answer A. 7.57 100% B. 10.43 C. 5.85 D. 6.43 E. 8.17 Score: 1/1 2. Determine the pH of a solution in which 20.0 mL of 0.2 M aqueous acetic acid (K a = 1.8 x 10 -5 ) has been titrated with 20.0 mL of 0.1 M NaOH(aq). Student Response Value Correct Answer A. 9.26 B. 1.8 x 10 -5 C. 4.74 100% D. 11.28 E. 2.72 Score: 1/1
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3. How many moles of NaOCl must be added to 150. mL of 0.0250 M HOCl solution to make a buffer of pH 7.50 if the K a of HOCl is 2.8 x 10 -8 ? Student Response Value Correct Answer A. 0.885 B. 2.2 x 10 -2 0% C. 2.8 x 10 -2 D. 3.3 x 10 -3 * E. 4.2 x 10 -3 Score: 0/1 4. During the titration of a weak base (K b = 1 x 10 - 10 ) with a strong acid, one should use an acid-base indicator that changes color in the pH range Student Response Value Correct Answer A. 5-7 B. 2-4 100% C. 10-13 D. 7-9 E. 6-8 Score: 1/1 5. What is the pH of a saturated solution of
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manganese(II) hydroxide (K sp = 2.0 x 10 -13 )? Student Response Value Correct Answer A. 4.43 B. 7.65 C. 4.13 D. 9.57 E. 9.87 100% Score: 1/1 6. What is the solubility of silver chloride (K sp = 1.1 x 10 -10 ) in a solution of 0.10 M magnesium chloride? Student Response
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Exam3 - EXAM 3 1. Determine the pH of a solution in which...

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