Q

A buffer solution has [CH3COOH]=0.1 M and [CH3COO-]=0.1 M. If pKa of CH3COOH is 4.76, then what is its pH?

RRB NTPC (G) CBT-1, 14-Jun-25 S-1 2025
✓ Answer: A 4.76
pH = pKa + log([A-]/[HA]) = 4.76 + log(0.1/0.1) = 4.76 + log(1) = 4.76.
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