A certain rust remover containing phosphoric acid has a density of 1.685 g/mL.Titration of a 59.3 mL sample of the rust remover requires 1.40 L of 1.86 M NaOH to completely react with the acid to form sodium phosphate.What is the mass percent H3PO4 (98.0 g/mol) in the rust remover?
A) 14.6%
B) 19.8%
C) 39.1%
D) 69.7%
E) 85.1%
Correct Answer:
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