Problem- A buffer is prepared by adding 0.30 mol CH3COONa to 2.0 L of a 0.10 M CH3COOH solution. Calculate the pH after 0.030 mol HCl are added to the buffer. (Ka for CH3COOH = 1.8 x 10-5)
A. 1.52
B. 4.68
C. 4.81
D. 5.13
E. 6.34
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