Ask Question
4 November, 08:16

1. What percent of light passes through the sample if its absorbance A=2?

2. For the best calibration curve, the transmittance values (%T) should fall within the range from 10% to 90%. What is the approximate range of corresponding absorbance values?

3. What is the absorbance of the solution if the percent transmittance for it is 10%?

+5
Answers (1)
  1. 4 November, 11:18
    0
    1. The formula for absorbance is given as:

    A = log (Io / I)

    where A is absorbance, Io is initial intensity, and I is final light intensity

    log (Io / I) = A

    log (Io / I) = 2

    Io / I = 100

    Taking the reverse which is I / Io:

    I / Io = 1 / 100

    I / Io = 0.01

    Therefore this means that only 0.01 fraction of light or 1% passes through the sample.

    2. What is meant by transmittance values is actually the value of I / Io. So calculating for A:

    at 10% transmittance = 0.10

    A = log (Io / I)

    A = log (1 / 0.10)

    A = 1

    at 90% transmittance = 0.90

    A = log (Io / I)

    A = log (1 / 0.90)

    A = 0.046

    So the absorbance should be from 0.046 to 1

    3. at 10% transmittance = 0.10

    A = log (Io / I)

    A = log (1 / 0.10)

    A = 1
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “1. What percent of light passes through the sample if its absorbance A=2? 2. For the best calibration curve, the transmittance values (%T) ...” 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