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A titration is performed by adding 0.791 M KOH to 40 mL of 0.127 M HC3H5O2. a)...

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Chemistry

A titration is performed by adding 0.791 M KOH to 40 mL of 0.127M HC3H5O2.

a) Calculate the pH before addition of any KOH.

b) Calculate the pH after the addition of 1.28, 3.21 and 5.42 mLof the base.(Show your work in detail for one of the volumes.)

c) Calculate the volume of base needed to reach the equivalencepoint.

d) Calculate the pH at the equivalence point.

e) Calculate the pH after adding 5.00 mL of KOH past theequivalence point.

f) Plot pH (y axis) versus volume of KOH added (x axis) for eachcalculation above. Sketch the titration curve.

Answer & Explanation Solved by verified expert
3.6 Ratings (614 Votes)
a pH before addition of any KOH pKa of HC3H5O2 489 pH 12 pKa logC pH 12 489 log0127 pH 289 b the pH after the addition of 128 millimoles of HC3H5O2 0127 x 40 508 millimoles of KOH 0791 x 128 101    See Answer
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