A 50.00 mL sample of a citrus drink consumed 14.33 mL of 0.05136 M KOH to reach the phenolphthalein end point. Express the sample’s acidity as grams of citric acid, HOC(CH2CO2H)2, per 100 mL. Note: phenolphthalein pH range = 8.3 – 10. pKa1 = 3.13, pKa2 = 4.76, pKa3 = 6.40.
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