A buffer solution contains 100 ml of 0.01 M CH3COOH and 200 ml of 0.02 M CH3COONa. 700 ml of H2O is further added. The pH values before and after dilution are respectively

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A buffer solution contains 100 ml of 0.01 M CH3COOH and 200 ml of 0.02 M CH3COONa. 700 ml of H2O is further added. The pH values before and after dilution are respectively