試題詳解

15.A student uses 16.60 mL of 0.100 M NaOH to titrate a 0.2000-g sample of an unknown acid. Which of the following acids is the unknown most likely to be? Assume that only the hydrogens bonded to oxygen are titrated by the sodium hydroxide and that, because of experimental error, the student's value may not be identical to the theoretical value.
(A) succinic acid, HOOCCH₂CH₂COOH, molar mass 118
(B) benzoic acid, C₆H₅COOH, molar mass 122
(C) phthalic acid, C₆H₄ (COOH)₂, molar mass 166
(D) oxalic acid, HOOCCOOH, molar mass 90
(E) not enough information