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A 50.00 mL sample of a citrus drink requires 17.62 mL of 0.04166 M NaOH to...

A 50.00 mL sample of a citrus drink requires 17.62 mL of 0.04166 M NaOH to reach the phenolphthalein end point (pH ≈ 9). Express the sample’s acidity as grams of citric acid, C6H8O7, per 100 mL. Hint: citric acid is a polyprotic acid. You need to determine first what is the end point of the titration from the three pKa (3.128, 4.761, 6.396) and end point pH in order to get the correct acid-base reaction.

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