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Which acid is the best choice to create a buffer with pH=7.38? %3D nitrous acid (HNO2), pKa = 3.34 O hypochlorous acid (HCIO), pKa =7.54 O acetic acid (HCH3CO2), pKa = 4.76 O chlorous acid (HC1O2), pKa = 1.95

Which acid is the best choice to create a buffer with pH=7.38? %3D nitrous acid (HNO2), pKa = 3.34 O hypochlorous acid (HCIO), pKa =7.54 O acetic acid (HCH3CO2), pKa = 4.76 O chlorous acid (HC1O2), pKa = 1.95

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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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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**Part A** **Question:** Which acid is the best choice to create a buffer with \( \text{pH} = 7.38 \)? **Options:** - Nitrous acid (\(\text{HNO}_2\)), \(pK_a = 3.34\) - Hypochlorous acid (\(\text{HClO}\)), \(pK_a = 7.54\) - Acetic acid (\(\text{HCH}_3\text{CO}_2\)), \(pK_a = 4.76\) - Chlorous acid (\(\text{HClO}_2\)), \(pK_a = 1.95\) **Submit Button:** - "Submit" button to confirm the selection. - "Request Answer" link for feedback or hints. **Part B** - Complete previous part(s). **Explanation:** In order to select the best acid for creating a buffer with a desired pH, choose the acid with a \( pK_a \) value close to the desired pH. This ensures the buffer can effectively neutralize both added acids and bases, maintaining stability around the target pH. For this question, hypochlorous acid (\(\text{HClO}\)) with a \( pK_a \) closest to 7.38 will be the most suitable choice.
Transcribed Image Text:**Part A** **Question:** Which acid is the best choice to create a buffer with \( \text{pH} = 7.38 \)? **Options:** - Nitrous acid (\(\text{HNO}_2\)), \(pK_a = 3.34\) - Hypochlorous acid (\(\text{HClO}\)), \(pK_a = 7.54\) - Acetic acid (\(\text{HCH}_3\text{CO}_2\)), \(pK_a = 4.76\) - Chlorous acid (\(\text{HClO}_2\)), \(pK_a = 1.95\) **Submit Button:** - "Submit" button to confirm the selection. - "Request Answer" link for feedback or hints. **Part B** - Complete previous part(s). **Explanation:** In order to select the best acid for creating a buffer with a desired pH, choose the acid with a \( pK_a \) value close to the desired pH. This ensures the buffer can effectively neutralize both added acids and bases, maintaining stability around the target pH. For this question, hypochlorous acid (\(\text{HClO}\)) with a \( pK_a \) closest to 7.38 will be the most suitable choice.
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