Question

A yellow dye, FD&C yellow 3, is used in some candy coatings.A 2.4*10^-5 M solution of this dye has an absorbance of 0.418 atits Amax. Show all work.

a. Calculate the molar absorptivity,E, of the dye at thiswavelength, assuming a sample cell with a 1.0 cm pathlength.

b. The yellow dye from one piece of candy is completelyextracted into 10.00 mL of water and diluted to 100.00 mL withwater. The absorbance of the diluted solution is 0.556 at its Amax.Calculate the concentration of the dye in the diluted solution.

c. Calculate the number of grams of this dye in the coating ofone piece of candy (MM of dye=271 g/mol).