Henderson Hasselbalch Trick

Henderson Hasselbalch Trick

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Question 1 of 10

1. Question
A buffer is created from acetic acid (pKa =4.8) and its conjugate base acetate and adjusted to a pH of 5.8. Which of the following is true about the solution?
- It has a higher concentration of acetic acid as compared to acetate
- It has a higher concentration of acetate as compared to acetic acid
- It has the same concentration of acetate and acetic acid
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Question 2 of 10

2. Question
A buffer is created out of benzoic acid (pKa = 4.2) and its conjugate base, benzoate, and adjusted to a pH of 2.2. Which of the following is true of the solution?
- It has a higher concentration of benzoic acid as compared to benzoate
- It has a higher concentration of benzoate as compared to benzoic acid
- It has the same concentration of benzoate and benzoic acid
Correct

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Question 3 of 10

3. Question
A buffered solution of carbonic acid (pK_a = 6.4) and bicarbonate was created and adjusted to a pH of 5.4. By what factor is the carbonic acid concentration increased in comparison to bicarbonate concentration in the buffer solution?
- 0.1
- 1
- 10
- 100
Correct

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Question 4 of 10

4. Question
Hydrazoic acid (pK_a = 4.72) is buffered to a pH of 5.72 what is the ratio of [HN₃] to [N₃^–] in the buffered solution?
- 1:100
- 1:10
- 100:1
- 10:1
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Question 5 of 10

5. Question
A lactic acid (pK_a = 3.86) buffer is created from 0.54 M lactic acid and 0.0054M lactate. What is the pH of the lactic acid buffer?
- 1.86
- 2.86
- 4.86
- 5.86
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Question 6 of 10

6. Question
A buffered solution contains 0.2 M of CHOOH (pKa = 3.7) and 0.002 M of CHOO^–. What will the pH of the buffer be?
- 1.7
- 3.7
- 4.7
- 5.7
Correct

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Question 7 of 10

7. Question
A buffered solution contains 0.02 M of CHOOH (pKa = 3.7) and 0.002 M of CHOO^–. What will the pH of the buffer be?
- 1.7
- 2.7
- 3.7
- 4.7
Correct

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Question 8 of 10

8. Question
A buffered solution of acetic acid (pK_a =4.8) and acetate is adjusted to a pH of 6.8. What is the ratio of acetic acid to acetate in solution?
- 1:2
- 1:100
- 2:1
- 100:1
Correct

Incorrect
Question 9 of 10

9. Question
A benzoic acid buffer at pH 6.19 was generated from 0.007 M C₆H₅COOH and 0.7 M C₆H₅COO^–. Based on this what is the pK_a of benzoic acid?
- 3.19
- 4.19
- 6.19
- 7.19
Correct

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Question 10 of 10

10. Question
A buffered solution containing 0.5 M acetic acid and 0.05 M acetate has a pH of 3.4. What is the pKa of acetic acid?
- 2.4
- 3.4
- 4.4
- 5.4
Correct

Incorrect

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