A student needs to prepare a buffer solution of propanoic acid and its sodium salt with pH 4. The ratio required to make the buffer is:

Question

A student needs to prepare a buffer solution of propanoic acid and its sodium salt with pH 4. The ratio  required to make the buffer is:

Canvas Classes · Accepted Answer

Step 1 — Henderson-Hasselbalch equation:

Step 2 — Calculate :

Step 3 — Solve for ratio:

Answer: Option (2) — 0.13

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