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What is the pH of a buffer solution made from 0.1 M acetic acid and 0.1 M sodium
What is the pH of a buffer solution made from 0.1 M acetic acid and 0.1 M sodium acetate? (2023)
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Q1
What is the pH of a buffer solution made from 0.1 M acetic acid and 0.1 M sodium acetate? (2023)
4.74
5.00
5.74
6.00
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Using the Henderson-Hasselbalch equation, pH = pKa + log([A-]/[HA]) = 4.74 + log(1) = 4.74.
Questions & Step-by-step Solutions
1 item
Q
Q: What is the pH of a buffer solution made from 0.1 M acetic acid and 0.1 M sodium acetate? (2023)
Solution:
Using the Henderson-Hasselbalch equation, pH = pKa + log([A-]/[HA]) = 4.74 + log(1) = 4.74.
Steps: 8
Show Steps
Step 1: Identify the components of the buffer solution. We have acetic acid (HA) and sodium acetate (A-).
Step 2: Determine the concentration of acetic acid (HA) and sodium acetate (A-). Both are 0.1 M.
Step 3: Use the Henderson-Hasselbalch equation: pH = pKa + log([A-]/[HA]).
Step 4: Find the pKa of acetic acid. It is approximately 4.74.
Step 5: Calculate the ratio of the concentrations: [A-]/[HA] = 0.1 M / 0.1 M = 1.
Step 6: Calculate the logarithm of the ratio: log(1) = 0.
Step 7: Substitute the values into the equation: pH = 4.74 + 0.
Step 8: Simplify the equation: pH = 4.74.
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