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Calculate the ratio of the concentrations of acetate and acetic acid required in a buffer system of pH 5.30.(a) 3.2(b) 3.3(c) 3.4(d) 3.5 |
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Answer» The correct choice is (d) 3.5 For explanation: pH = pKa + log [acetate]/[acetic acid] log [acetate]/[acetic acid] = pH – pKa = 5.30 – 4.76 = 0.54 [acetate]/[acetic acid] = antilog 0.54 = 3.5. |
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