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Lactic acid, HC3H5O3, is a substance found in sour milk products such as yogurt and is produced naturally by fermentation in body cells during normal metabolism and exercise The Ka for lactic acid is 1.38 x 10-4. Its sodium salt, sodium lactate, NaC3H5O3 , is used in foods as a preservative and acidity regulator . It is also used in shampoo products as an effective humectant and moisturizer. Determine the pH of a solution prepared by diluting 6.10 grams of sodium lactate to a final volume of 750