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You need to prepare an acetate buffer of pH 6.50 from a 0.770 M acetic acid...

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Chemistry

You need to prepare an acetate buffer of pH 6.50 from a 0.770 Macetic acid solution and a 2.85 M KOH solution. If you have 675 mLof the acetic acid solution, how many milliliters of the KOHsolution do you need to add to make a bufer of pH 6.50? The pKa ofacetic acid is 4.76.

Answer & Explanation Solved by verified expert
3.8 Ratings (390 Votes)
Write down the acid dissociation of acetic acid HAc as HAc aq H aq Ac aq The pH is given by the HendersonHasslebach equation as pH pKa log AcHAc Plug in pH 650 and pKa 476 to obtain the ration of AcHAc as 650 476 log AcHAc 174 log AcHAc AcHAc antilog 174 54954 Ac 54954HAc 1 Again we are given that HAc 0770 M therefore Ac 549540770 M 42314 M We must have the    See Answer
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