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What mass(n grams) of sodium acetate (MM = 82g/mol) is needed to prepare 500 mL of 25 mM acetate buffer pH 3.89 (pKa for acetic

What mass(n grams) of sodium acetate (MM = 82g/mol) is needed to prepare 500 mL of 25 mM acetate buffer pH 3.89 (pKa for acetic acid is 4.74)? Report your answer up to 2 decimal places. Do NOT round OFF intermediate answers. No need to indicate the unit.

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