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2. Lactic acid (which has the IUPAC name 2-hydroxypropanoic acid) has Ka = 1.4 x 10-4 . What is the pH of 100.0 mL of solution that is 0.12 M in lactic acid and 0.080 M in sodium lactate? Show your work. You may use “LacH” and “Lac-“ as abbreviations for lactic acid and lactate, if you wish. (You may wish to review the benzoic acid/sodium benzoate problem in Acid-base video 7.)