Calculate the pH of a buffer containing 0.2 mol/L CH₃COOH and 0.1 mol/L CH₃COONa — JEE Chemistry
Calculate the pH of a buffer containing 0.2 mol/L $CH_3COOH$ and 0.1 mol/L $CH_3COONa$. ($pK_a = 4.74$)
1 Answer
PIPooja Iyer
✓ Accepted
· 1mo ago
▲ 40
Using Henderson–Hasselbalch equation:
$$pH = pK_a + \log\frac{[Salt]}{[Acid]} = 4.74 + \log\frac{0.1}{0.2} = 4.74 + \log(0.5)$$
$$= 4.74 - 0.301 = 4.44$$
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Discussion (3)
N
Quick doubt: would this method still work if the numbers were not so clean?
L
This is exactly the kind of step-by-step I needed. Respect.
DM
Quick doubt: would this method still work if the numbers were not so clean?