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ID: A AP 16.4-16.7 Study Questions Multiple Choice Identify the choice that best completes the statement or answers the question. 1 What is the pH of an aqueous solution at 25.0 °C 9 Which solution below has the highest in which [H+] is 0.0025 M? concentration of hydroxide ions? A 3.40 B 2.60 C -2.60 D -3.40 E 2.25 A pH = 3.21 B pH = 12.6 C pH = 7.93 D pH = 9.82 E pH = 7.00 2 What is the pH of an aqueous solution at 25.0 °C in which [OH-] is 0.0025 M? 10 Which one of the following statements regarding A +2.60 B -2.60 C +11.4 D -11.4 E -2.25 Kw is false? A pKw is 14.00 at 25°C B The value of Kw is 3 What is the pH of an aqueous solution at 25.0 °C always 1.0 × 10-14. C Kw changes with that contains 3.98 × 10-9 M hydronium ion? temperature. D The value of Kw shows that A 8.400 B 5.600 C 9.000 D 3.980 E 7.000 water is a weak acid. E Kw is known as the ion product of water. 4 What is the pH of an aqueous solution at 25.0 °C that contains 3.98 × 10-9 M hydroxide ion? 11 An aqueous solution at 25.0°C contains [H+] = A 8.40 B 5.60 C 9.00 D 3.98 E 7.00 0.099 M. What is the pH of the solution? A 1.00 B -1.00 C 13.0 D 0.0990 E 1.00 × 5 What is the concentration (in M) of hydronium 10-13 ions in a solution at 25.0 °C with pH = 4.282? A 4.28 B 9.71 C 1.92 × 10-10 D 5.22 × 10-5 12 The pH of an aqueous solution at 25.0°C is E 1.66 × 104 10.66. What is the molarity of H+ in this solution? A 2.2 × 10-11 B 4.6 × 10-4 C 3.3 D 1.1 × 6 What is the concentration (in M) of hydroxide 10 -13 E 4.6 × 10 10 ions in a solution at 25.0 °C with pH = 4.282? A 4.28 B 9.72 C 1.91 × 10-10 D 5.22 × 10-5 E 1.66 × 104 13 Calculate the molarity of hydroxide ion in an aqueous solution that has a pOH of 5.33. A 4.7 × 10-6 B 8.67 C 2.1 × 10-9 D 5.3 × 7 Calculate the pOH of a solution at 25.0 °C that 10 -14 E 8.7 × 10 -14 contains 1.94 × 10-10 M hydronium ions. A 1.94 B 4.29 C 7.00 D 14.0 E 9.71 14 What is the pH of a 0.015 M aqueous solution of 8 Calculate the concentration (in M) of hydronium barium hydroxide? A 12.48 B 12.25 C 1.82 D 10.41 E 1.52 ions in a solution at 25.0 °C with a pOH of 4.223. A 5.98 × 10-5 B 1.67 × 10-10 C 1.67 × 104 D 5.99 × 10-19 E 1.00 × 10-7 15 What is the pOH of a 0.0150 M solution of barium hydroxide? A 12.2 B 12.5 C 1.52 D 1.82 E 10.4 1 Class Copy - Do Not Write On This Test!!! ID: A 16 An aqueous solution contains 0.100 M NaOH at 23 A 0.15 M aqueous solution of the weak acid HA 25.0°C. The pH of the solution is __________. at 25.0 °C has a pH of 5.35. The value of Ka for A 0.100 B 1.00 C 13.00 D 7.00 E -1.00 HA is __________. A 3.0 × 10-5 B 1.8 × 10-5 C 7.1 × 10-9 D 1.3 × 17 The hydride ion, H-, is a stronger base than the 10-10 E 3.3 × 104 hydroxide ion, OH-. The product(s) of the reaction of hydride ion with water is/ are 24 The Ka of hypochlorous acid (HClO) is 3.0 × 10-8 __________. at 25.0°C. Calculate t

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