Problem: In a titration a student used 16.60 mL of 0.100 M NaOH to titrate a 0.2000-g sample of an unknown acid. Which of the following acids would the unknown most probably be? Assume that only the hydrogens bonded to oxygen (in BOLD) are titrated by the sodium hydroxide, and that, due to experimental error, the student's value may not be identical with 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. HOOC—COOH. molar mass = 90. E. Not enough information is provided to narrow the selection to one.

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In a titration a student used 16.60 mL of 0.100 M NaOH to titrate a 0.2000-g sample of an unknown acid. Which of the following acids would the unknown most probably be? Assume that only the hydrogens bonded to oxygen (in BOLD) are titrated by the sodium hydroxide, and that, due to experimental error, the student's value may not be identical with 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. HOOC—COOH. molar mass = 90.

E. Not enough information is provided to narrow the selection to one.

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