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Chapter 16 - Chapter 16 Acid-Base Equilibria and Solubility...

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Page 300 Chapter 16: Acid-Base Equilibria and Solubility Equilibria A table of ionization constants and K a 's is required to work some of the problems in this chapter. 1. In which one of the following solutions will acetic acid have the greatest percent ionization? A) 0.1 M CH 3 COOH B) 0.1 M CH 3 COOH dissolved in 1.0 M HCl C) 0.1 M CH 3 COOH plus 0.1 M CH 3 COONa D) 0.1 M CH 3 COOH plus 0.2 M CH 3 COONa Ans: A Category: Medium Section: 16.2 2. Which one of the following is a buffer solution? 3. Which one of the following combinations cannot function as a buffer solution? 4. Which of the following is the most acidic solution? 5. Calculate the pH of a buffer solution that contains 0.25 M benzoic acid (C 6 H 5 CO 2 H) and 0.15M sodium benzoate (C 6 H 5 COONa). [K a = 6.5 × 10 –5 for benzoic acid] A) 3.97 B) 4.83 C) 4.19 D) 3.40 E) 4.41 Ans: A Category: Medium Section: 16.3 6. A solution is prepared by mixing 500. mL of 0.10 M NaOCl and 500. mL of 0.20 M HOCl. What is the pH of this solution? [K a (HOCl) = 3.2 × 10 –8 ]
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