Vitamin C Is a Monoprotic Weak Acid, Which Also Is

Multiple Choice

Vitamin C is a monoprotic weak acid, which also is called ascorbic acid (C₆H₈O₅, 176 g/mol) . A vitamin C tablet weighing 0.75 g was dissolved in 50.0 mL of water and titrated with 0.250 M sodium hydroxide. It took 12.5 mL of the NaOH solution to reach the end point. What is the percentage of vitamin C in the tablet? Only the vitamin C reacted with the NaOH.

A) 98.7%
B) 64.2%
C) 87.7%
D) 95.5%
E) 73.3%