A food-dye manufacturer prepares four quality-control samples (A, B, C, D) that all…
CHEMISTRY · Multi-part · AP · Chemistry · Properties of Substances and Mixtures · Properties of Substances and Mixtures
Problem
A food-dye manufacturer prepares four quality-control samples (A, B, C, D) that all contain the same dye dissolved in water. Each sample is placed in an identical 1.00cm cuvette, and the absorbance of each solution is measured at the dye’s maximum-absorbance wavelength.
Measured absorbances:
A = 0.033 B = 0.120 C = 0.089 D = 0.056
Independent analysis has already established that Sample C has a dye concentration of 1.50×10−4M.
(1) Part 1: (a) Rank the four samples from the lowest to the highest dye concentration. Justify your ranking.
(2) Part 2: (b) Calculate the dye concentration (in molL−1) of Sample B. Show your work and express the answer with appropriate significant figures.