This question combines a dilution problem with Beer's law.

Given a stock solution of a food dye having a concentration of 1.0 x 10-5 M and an absorbance of 0.700. If a new solution is made by diluting exactly 10.0 mL of the solution with exactly 30.6 mL of distilled water, what should the absorbance of the new solution be?

Question

This question combines a dilution problem with Beer's law.

Given a stock solution of a food dye having a concentration of 1.0 x 10-5 M and an absorbance of 0.700. If a new solution is made by diluting exactly 10.0 mL of the solution with exactly 30.6 mL of distilled water, what should the absorbance of the new solution be?

ookawaiioo · Answer

Less than the original value.....concentration is decreased

chmvijay · Answer

Absorbance is directly proportional to the concenteraration
A=ecl

jfraser · Answer

Use the formula that @chmvijay suggests twice: once to find the value of $\epsilon$ with the known concentration and absorbance, then plug the second set in to find the concentration