The mass in milligrams of quinine in the tablet should be determined. Concept introduction: The amount of quinine is the product of concentration of quinine and the ratio of the fluorescent intensity of the sample and the fluorescent intensity of the dilute sample.

Question

Quinine in a 1.553-g antimalarial tablet was dissolved in sufficient 0.10 M HCl to give 250 mL of solution.A 10.00-mL aliquot was then diluted to 50.00 mL with the acid. The fluorescence intensity for the dilutedsample at 347.5 nm provided a reading of 196 on an arbitrary scale. A standard 100-ppm quinine solutionregistered 125 when measured under conditions identical to those for the diluted sample. Calculate the massin milligrams of quinine in the tablet.

Answer 1

Question

Chapter 15, Problem 15.9QAP

Interpretation Introduction

Interpretation:

The mass in milligrams of quinine in the tablet should be determined.

Concept introduction:

The amount of quinine is the product of concentration of quinine and the ratio of the fluorescent intensity of the sample and the fluorescent intensity of the dilute sample.

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Quinine in a 1.553-g antimalarial tablet was dissolved in sufficient 0.10 M HCl to give 250 mL of solution.A 10.00-mL aliquot was then diluted to 50.00 mL with the acid. The fluorescence intensity for the dilutedsample at 347.5 nm provided a reading of 196 on an arbitrary scale. A standard 100-ppm quinine solutionregistered 125 when measured under conditions identical to those for the diluted sample. Calculate the massin milligrams of quinine in the tablet.

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