36. Lactic acid is a weak acid with the formula HC3H5O3, the Ka for lactic acid is 1.38 x 10-4 In aqueous solution, lactic acid partially dissociates according to the following reaction: HC3H5O3 + H2O ⇔ C3H5O3- + H3O+ Calculate the pH of the lactic acid solution described below: Volume:  250 mL Concentration:  0.2931 M Since this is a weak acid, you can assume the amount of acid dissociated is << 5% of the total amount of acid present

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.