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 e for this compound? A) 2.57 ´ 10⁵ B) 2.20 ´ 10⁴ C) 4.54 ´ 10^-5 D) 2.92 ´ 10⁴

Question

Quizplus · Accepted Answer

Using Beer's Law, A = ecl, we can rearrange to solve for e: e = A/cl.
Given A = 0.753, c = 3.42 ´ 10-5 M, and the path length l = 1.00 cm, we can calculate e:
e = 0.753 / (3.42 ´ 10-5 M × 1.00 cm)
e ≈ 2.20 ´ 104 M-1 cm-1. 
Therefore, the correct answer is choice B.

A 342 ´ 10-5 M Solution of Dibenzalacetone in Ethanol Produced

A 342 ´ 10^-5 M Solution of Dibenzalacetone in Ethanol Produced