A 3.42 *10^-⁵ M solution of dibenzalacetone in ethanol produced an absorbance of 0.753 in a 1.00 cm cell. Based on this data, what is $\varepsilon$ for this compound?

Question

Quizplus · Accepted Answer

Using Beer-Lambert law, A = εbc where A is the absorbance, ε is the molar absorptivity, b is the path length, and c is the concentration. Since b = 1.00 cm and c = 3.42 M, we can rearrange the equation as: ε = A/(bc) Plugging in the values: ε = 0.753/(1.00 cm x 3.42 M) = 0.220 L/(mol.cm) So the answer is A) 2.20 L/(mol.cm) which is equivalent to 2.20 F1F1F1S1F1F1F10 10⁴.

A 342 *10-5 M Solution of Dibenzalacetone in Ethanol Produced an an Absorbance

A 342 *10^-⁵ M Solution of Dibenzalacetone in Ethanol Produced an an Absorbance