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For acetic acid pKa =4.74. A buffer solution was made using 0.30 mole of acetic acid...

For acetic acid pKa =4.74. A buffer solution was made using 0.30 mole of acetic acid and an unspecified and amount of sodium acetatein water to make 2.00 liters of solution. The solution pH was 4.91. Calculate the number of moles of sodium acetate used.

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