A noncarbonated soft drink contains an unknown amount of citric acid, H3C6H5O7. If 100.0 mL of the soft drink requires 33.51 mL of 0.0102 M NaOH to neutralize the citric acid completely, what mass of citric acid does the soft drink contain? The reaction of citric acid and NaOH is:
H3C6H5O7 (aq) 3 NaOH (aq)  Na3C6H5O7 (aq) 3 H2O (l)