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Consider a weak acid-strong base titration in which 25 mL of 0.120 M of acetic acid...

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Chemistry

Consider a weak acid-strong base titration in which 25 mL of0.120 M of acetic acid is titrated with 0.120 M of NaOH.

a) Calculate the pH of the acetic acid solution BEFORE additionof NaOH (pKa of acetic acid = 4.75).

b) Calculate the pH after the addition of 3.00 mL of NaOH.

c) Calculate the pH after the additon of 12.5 mL of NaOH. Noticethat this is the half neutralizatiom point: some of the acetic acidmolecules are converted to acetate ions producing a buffer whose pHdepends on the base/acid ratio (CH3COO-/CH3COOH).

d) Calculate the pH after the addtion of 25 mL of NaOH(equivalence point).

e) Calculate the pH after the addition of 35 mL of NaOH.

f) suggest an indicator other then phenolphthalein that would besuitable for this titration and explain why.

Thank you very much.

Answer & Explanation Solved by verified expert
3.6 Ratings (274 Votes)
Titration a before addition of base CH3COOH CH3COO H let x amount has dissociated pKa logKa Ka 180 x 105 Ka CH3COOHCH3COOH 180 x 105 x20120 x H 147 x 103 M pH logH 283 b after 3 ml of NaOH added CH3COOH NaOH    See Answer
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