Solutions Rev Prob. Exam 3 09-106 S 11

Solutions Rev Prob. Exam 3 09-106 S 11 - Review Problems...

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Review Problems for Exam 3 (with selected answers) 09-106 Spring 2010 I. For the following statements, circle T if the statement is TRUE and F if it is FALSE. T F 1. The strongest base that can exist in liquid H 2 O is OH - . T F 2. CH 3 NH 2 is a weak base and a poor conductor of electricity when dissolved in water. T F 3. In the reaction CO 2 (g) + OH - (aq) b HCO 3 - (aq), CO 2 is a Lewis acid. T F 4. When a weak base is titrated with a strong acid, the pH at the equivalence point is always < 7. T F 5. For a buffer containing a weak base B and its conjugate B-H + , if [B] > [B-H + ] the buffer is more resistant to pH changes upon the addition of OH - than upon the addition of H + . T F 6. An H 2 SO 3 / KHSO 3 buffer can be made by adding a strong base to a solution of H 2 SO 3 T F 7. For a buffer with a fixed ratio of [HA] to [A - ], doubling the concentrations of both HA and A - will increase the buffer capacity. T F 8. The end point in a titration estimates the equivalence point upon observation of a change in indicator color. T F 9. The weaker a base is, the stronger its conjugate acid is. T F 10. If a strong base is diluted sufficiently with pure water, the pH will be lower than 7. II. Circle the letter of the best answer for the following multiple choice questions. 1. Which of the following aqueous solutions has the highest conductivity? (a) 0.10 M HBrO (
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Solutions Rev Prob. Exam 3 09-106 S 11 - Review Problems...

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