(Solution) - A solution was prepared by mixing 25 00 mL of 0 080 -(2025 Original AI-Free Solution)

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A solution was prepared by mixing 25.00 mL of 0.080 0 M aniline, 25.00 mL of 0.060 0 M sulfanilic acid, and 1.00 mL of 1.23 × 10-4 M HIn and then diluting to 100.0 mL. (HIn stands for protonated indicator.)

The absorbance measured at 550 nm in a 5.00-cm cell was 0.110. Find the concentrations of HIn and In- and pKa for HIn.