Ask Question
12 April, 14:25

You are measuring the concentration of Fe 2 in a sample is determined by measuring the absorbance of its complex with ferroxine. The sample, measured in a 1.00 cm cuvette, has an absorbance of 0.333. The reagent blank in the same cuvette has an absorbance of 0.014. What would be the absorbance reading for each of these two solutions if measured in a 5.00 cm cuvette?

+1
Answers (1)
  1. 12 April, 15:23
    0
    Sample: 1.67

    Blank: 0.070

    Explanation:

    The absorbance of a solution (A) is explained by the Beer-Lambert law.

    A = ε. l. c

    where,

    ε is the absorptivity of the species

    l is the optical path length

    c is the molar concentration of the species

    As we can see, the absorbance is directly proportional to the path length, that is, the length of the cuvette. If l is increased 5 times (1.00 cm to 5.00 cm), the absorbance will also be increased 5 times.

    The absorbance of the sample will be 5 * 0.333 = 1.67

    The absorbance of the blank will be 5 * 0.014 = 0.070
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “You are measuring the concentration of Fe 2 in a sample is determined by measuring the absorbance of its complex with ferroxine. The ...” in 📘 Chemistry if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers