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A 4.236 g quinine tablet was dissolved in 0.150 M HCl and diluted to 500 mL...

A 4.236 g quinine tablet was dissolved in 0.150 M HCl and diluted to 500 mL of solution. Dilution of a 20.0 mL aliquot to 100 mL yielded a solution that gave a fluorescence reading at 347.5 nm of 438 arbitrary units. A second 20.0 mL aliquot of the original solution was mixed with 10.0 mL of 50 ppm quinine solution before dilution to 100 mL. The fluorescence intensity of this solution was 542. Calculate the percent quinine in the tablet. The answer is 1.24 %

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queen_honey_blossom answered 2 years ago
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