A 0500 G Sample of an Unknown Substance Was Titrated with with a 0.1

question 68

Multiple Choice

A 0.500 g sample of an unknown substance was titrated with a 0.1 M HCl solution. Another 0.500 g sample of it was titrated with a 0.1 M NaOH solution. The resulting titration curves are illustrated here. Given the following possibilities, what is the sample?

• A)Na₂CO₃
• B)NaHCO₃
• C)H₂CO₃
• D)CO₂
• E)There is no way to tell.

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