APFIVE Titration of a Carbonate Mixture
A 0.500 g sample of a mixture of NaHCO₃ and Na₂CO₃ is dissolved in water. The solution is titrated with 0.100 M HCl, and 65.0 mL of the acid is required to reach the methyl orange endpoint. What is the mass percentage of NaHCO₃ in the original mixture?
A
84.3%
B
36.5%
C
63.5%
D
58.0%
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