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An aqueous solution contains 0.31 M hypochlorous acid. One Liter of this solution could be converted into a buffer by the addition of: (Assume that the volume remains constant as each substance is added.) (Select all that apply.) 0.32 mol NaClO 00.08 mol Ca(OH)2 0.15 mol HC104 0.31 mol Nal 0.32 mol HC104

An aqueous solution contains 0.31 M hypochlorous acid. One Liter of this solution could be converted into a buffer by the addition of: (Assume that the volume remains constant as each substance is added.) (Select all that apply.) 0.32 mol NaClO 00.08 mol Ca(OH)2 0.15 mol HC104 0.31 mol Nal 0.32 mol HC104

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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### Buffer Solution Calculation **Problem:** An aqueous solution contains 0.31 M hypochlorous acid. **Objective:** One liter of this solution could be converted into a buffer by the addition of: *(Assume that the volume remains constant as each substance is added.)* **Question:** *Select all that apply.* **Options:** - [ ] 0.32 mol NaClO - [ ] 0.08 mol Ca(OH)₂ - [ ] 0.15 mol HClO₄ - [ ] 0.31 mol NaI - [ ] 0.32 mol HClO₄ **Explanation:** For creating a buffer solution, we need to add a substance that will react with the hypochlorous acid (a weak acid) to form its conjugate base. This will create a buffer system that resists changes in pH. **Analysis:** - NaClO (Sodium hypochlorite): It will provide the ClO⁻ ions necessary to form the conjugate base with hypochlorous acid. - Ca(OH)₂ (Calcium hydroxide): It will increase the pH and could react with the hypochlorous acid. - HClO₄ (Perchloric acid, shown twice with different amounts): Adding more strong acid will not help create a buffer with the hypochlorous acid. - NaI (Sodium iodide): Adding this salt does not contribute to forming a buffer system with hypochlorous acid.
Transcribed Image Text:### Buffer Solution Calculation **Problem:** An aqueous solution contains 0.31 M hypochlorous acid. **Objective:** One liter of this solution could be converted into a buffer by the addition of: *(Assume that the volume remains constant as each substance is added.)* **Question:** *Select all that apply.* **Options:** - [ ] 0.32 mol NaClO - [ ] 0.08 mol Ca(OH)₂ - [ ] 0.15 mol HClO₄ - [ ] 0.31 mol NaI - [ ] 0.32 mol HClO₄ **Explanation:** For creating a buffer solution, we need to add a substance that will react with the hypochlorous acid (a weak acid) to form its conjugate base. This will create a buffer system that resists changes in pH. **Analysis:** - NaClO (Sodium hypochlorite): It will provide the ClO⁻ ions necessary to form the conjugate base with hypochlorous acid. - Ca(OH)₂ (Calcium hydroxide): It will increase the pH and could react with the hypochlorous acid. - HClO₄ (Perchloric acid, shown twice with different amounts): Adding more strong acid will not help create a buffer with the hypochlorous acid. - NaI (Sodium iodide): Adding this salt does not contribute to forming a buffer system with hypochlorous acid.
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