1. Suppose you are titrating a dilute acetic acid solution in a flask with NaOH

Question

1. Suppose you are titrating a dilute acetic acid solution in a flask with NaOH in the buret. Acetic acid is a weak acid that has the formula CH3COOH and the following structure: Which three species are present in the largest quantities in the flask before any NaOH is added? H+, OH-, H2O, CH3COOH, CH3COO-

2.For the titration of a dilute acetic acid solution with NaOH, rank the following species from highest to lowest in terms of quantity at the equivalence point, 1=highest quantity 4=lowest quantity CH3COOH, H2O, OH-, CH3COO-

Explanation / Answer

1.   CH3COOH <===> CH3COO- + H+

it is a weak acid exhibits equilibrium.

   so that , CH3COOH , CH3COO- , H+ are present .

2. CH3COOH(4), H2O(2), OH-(3), CH3COO-(1)

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