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What mass (in grams) of potassium acetate, KC2H3O2, must be added to 82 mL of 0.010...

What mass (in grams) of potassium acetate, KC2H3O2, must be added to 82 mL of 0.010 M acetic acid to form a buffer solution with a pH of 5.24? (Ka (HC2H3O2)= 1.8 x 10-5)

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