1.

Calculate the pH of a mixture of 0.10M acetic acid and 0.20M sodium acetate. The pKa  of acetic acid is 4.76.(a) 5.1(b) 4.1(c) 6.1(d) 7.1

Answer» Correct choice is (a) 5.1

The explanation: pH = pKa + log [acetate]/[acetic acid]

 = 4.76 + log (0.2/0.1)

 = 4.76 + 0.30

 = 5.1.


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