1. You wish to determine the %concentration of a stock solution of brilliant blue FCF (MW=792.8grams/mole; extinction coefficient2s=97000M'cm''). You make a 1:50 dilution of stock and then you take lul from your 1:50 dilution and dilute up to 1ml in a 1cm diameter cuvette. You obtain an A625=0.1. What is your total dilution factor? What is the % concentration of the dye in the original stock? 625

1. You wish to determine the %concentration of a stock solution of brilliant blue FCF (MW=792.8grams/mole; extinction coefficient2s=97000M'cm''). You make a 1:50 dilution of stock and then you take lul from your 1:50 dilution and dilute up to 1ml in a 1cm diameter cuvette. You obtain an A625=0.1. What is your total dilution factor? What is the % concentration of the dye in the original stock? 625

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter7: Statistical Data Treatment And Evaluation

Section: Chapter Questions

Problem 7.21QAP

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The %purity of a powdered crude sample of Na2CO3 containing only inert impurities is to be determined by reacting 225.0 mg of the crude sample to 10.0 mL of 3.00 M HCl solution, and bubbling the resulting CO2(g) product in water that is at exactly 29 °C. After the reaction has completed, the level of the liquid inside the eudiometer rests 4.30 cm above the water level in the beaker. The graduation on the eudiometer indicates that the trapped gas is 44.37 mL. The experiment was done under a barometric pressure of 755.2 torr. What CASE does this experiment satisfy?
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