A 0.187 gram sample of a CO3^2 antacid is dissolved with 25.0 mL of 0.0984 M HCl. The HCl that is NOT neutralized by the antacid is titrated to a bromophenol blue endpoint with 5.85 mL of 0.0911 M NaOH: If the active ingredient in the antacid sample is CaCO3, calculate the mass of CaCO3 in the sample.

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A 0.187 gram sample of a CO3^2 antacid is dissolved with 25.0 mL of 0.0984 M HCl. The HCl that is NOT neutralized by the antacid is titrated to a bromophenol blue endpoint with 5.85 mL of 0.0911 M NaOH: If the active ingredient in the antacid sample is CaCO3, calculate the mass of CaCO3 in the sample. What is the percent active ingredient in the antacid sample?

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