Select any systems that could be used to buffer a solution at a pH of 6. Mark all appropriate answers. O NH4 NH3 Ka-5.6 x 10 10 O HCO37C032 Ka-4.8 x 10-11 O CgHsCOOH/CgHgCOO Ka=6.46 x 105 O HSO4 7SO,2- O H2COgHCO3 Kg=1.02 x 10-7 K4.3 x 107 O HFIF K 7.2 x 10
Select any systems that could be used to buffer a solution at a pH of 6. Mark all appropriate answers. O NH4 NH3 Ka-5.6 x 10 10 O HCO37C032 Ka-4.8 x 10-11 O CgHsCOOH/CgHgCOO Ka=6.46 x 105 O HSO4 7SO,2- O H2COgHCO3 Kg=1.02 x 10-7 K4.3 x 107 O HFIF K 7.2 x 10
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
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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**QUESTION 6**
Select any systems that could be used to buffer a solution at a pH of 6. Mark all appropriate answers.
- [ ] \( \text{NH}_4^+/ \text{NH}_3 \) \hspace{30pt} \( \text{K}_a = 5.6 \times 10^{-10} \)
- [ ] \( \text{HCO}_3^-/\text{CO}_3^{2-} \) \hspace{20pt} \( \text{K}_a = 4.8 \times 10^{-11} \)
- [ ] \( \text{C}_6\text{H}_5\text{COOH}/\text{C}_6\text{H}_5\text{COO}^- \) \hspace{10pt} \( \text{K}_a = 6.46 \times 10^{-5} \)
- [ ] \( \text{HSO}_4^-/\text{SO}_4^{2-} \) \hspace{30pt} \( \text{K}_a = 1.02 \times 10^{-7} \)
- [ ] \( \text{H}_2\text{CO}_3/\text{HCO}_3^- \) \hspace{20pt} \( \text{K}_a = 4.3 \times 10^{-7} \)
- [ ] \( \text{HF}/\text{F}^- \) \hspace{50pt} \( \text{K}_a = 7.2 \times 10^{-4} \)
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**QUESTION 7**
What would the base/acid ratio be for the \( \text{CH}_3\text{COOH}/ \text{CH}_3\text{COO}^- \) system in order to create a pH 5.7? Round to two decimal places.
[Text Box for Answer]
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**QUESTION 8**
How many grams of \( \text{NH}_4\text{Cl} \) must be added to 0.100 L of 0.445 M \( \text{NH}_3 \) to produce a buffer solution with pH = 9.37? \( \text{pK}_a (\](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F3c46e66a-ed8b-4158-949b-36fba10ee611%2F68f221e7-e01b-4c2c-97f1-b37d8e4cea1f%2Fqp5b1p6_processed.jpeg&w=3840&q=75)
Transcribed Image Text:**Question Completion Status:**
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**QUESTION 6**
Select any systems that could be used to buffer a solution at a pH of 6. Mark all appropriate answers.
- [ ] \( \text{NH}_4^+/ \text{NH}_3 \) \hspace{30pt} \( \text{K}_a = 5.6 \times 10^{-10} \)
- [ ] \( \text{HCO}_3^-/\text{CO}_3^{2-} \) \hspace{20pt} \( \text{K}_a = 4.8 \times 10^{-11} \)
- [ ] \( \text{C}_6\text{H}_5\text{COOH}/\text{C}_6\text{H}_5\text{COO}^- \) \hspace{10pt} \( \text{K}_a = 6.46 \times 10^{-5} \)
- [ ] \( \text{HSO}_4^-/\text{SO}_4^{2-} \) \hspace{30pt} \( \text{K}_a = 1.02 \times 10^{-7} \)
- [ ] \( \text{H}_2\text{CO}_3/\text{HCO}_3^- \) \hspace{20pt} \( \text{K}_a = 4.3 \times 10^{-7} \)
- [ ] \( \text{HF}/\text{F}^- \) \hspace{50pt} \( \text{K}_a = 7.2 \times 10^{-4} \)
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**QUESTION 7**
What would the base/acid ratio be for the \( \text{CH}_3\text{COOH}/ \text{CH}_3\text{COO}^- \) system in order to create a pH 5.7? Round to two decimal places.
[Text Box for Answer]
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**QUESTION 8**
How many grams of \( \text{NH}_4\text{Cl} \) must be added to 0.100 L of 0.445 M \( \text{NH}_3 \) to produce a buffer solution with pH = 9.37? \( \text{pK}_a (\
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