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# Use the Henderson-Hasselbalch equation to perform the following calculations.

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2 months ago
 Use the Henderson-Hasselbalch equation to perform the following calculations. Use the Henderson-Hasselbalch equation to perform the following calculations. The Ka of acetic acid is:  1.8 × 10–5. FW for sodium acetate, trihydrate (NaC2H3O2•3H2O) is 136.08 g/mol.• Buffer A: Calculate the mass of solid sodium acetate required to mix with 50.0 mL of0.1 M acetic acid to prepare a pH 4 buffer. • Buffer B: Calculate the mass of solid sodium acetate required to mix with 50.0 mL of1.0 M acetic acid to prepare a pH 4 buffer. Read 98 times 5 Replies
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bio_manbio_man
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2 months ago
 So, I tried replicating it for Buffer B, since there is 1.0 M of acetic acid, and all the numbers are the same, wouldn't the answer be 3.321 g? I noticed Buffer B's answer is similar to Buffer A's answer, but with the decimal moving to the right, once.
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Educator
2 months ago
 I've modified it Attached file Thumbnail(s): You must login or register to gain access to this attachment.
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2 months ago
 Thank you, that's what I got except I added an extra sig fig
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Educator
2 months ago
 Considering significant figures, it should only be 2 sf, thus 3.2 will suffice.
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