A buffer solution is prepared by adding 12.71 g of sodium acetate (NaC2H3O2) and 15.98 g of acetic acid to enough water to make 500 mL (three significant figures) of solution. Calculate the pH of this buffer. Ka (HC2H3O2) = 1.8 × 10-5 Molar mass HC2H3O2 = 60.05 g/mol Molar mass NaC2H3O2 = 82.03 g/mol pH = _________

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