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Calculate the pH of the following two buffer solutions: (a) 2.4 M CH3COONa / 1.9 M CH3COOH. (b) 0.2 M CH3COONa / 0.2 M CH3COOH. Which is the more effective buffer? a. 2.4 M CH3COONa / 1.9 M CH3COOH b. 0.2 M CH3COONa / 0.2 M CH3COOH