An Impure Sample of Benzoic Acid (C₆H₅COOH,122

question 76

Multiple Choice

An impure sample of benzoic acid (C₆H₅COOH,122.12 g/mol) is titrated with 0.9855 M NaOH.A 3.412-g sample requires 24.43 mL of titrant to reach the endpoint.What is the percent by mass of benzoic acid in the sample?
C₆H₅COOH(aq) + NaOH(aq) → NaC₆H₅COO(aq) + H₂O(l)

• A)0.01971 %
• B)2.407 %
• C)100 %
• D)19.71 %
• E)86.18 %

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