What absorbance value corresponds to 40.2% T? A = A 0.0130 M solution of a certain analyte exhibits 40.2% T at a wavelength of 280 nm. What will the percent transmittance be for a 0.0255 M solution of the same analyte? Assume the pathlengths for each measurement are equal. %T = %

What absorbance value corresponds to 40.2% T? A = A 0.0130 M solution of a certain analyte exhibits 40.2% T at a wavelength of 280 nm. What will the percent transmittance be for a 0.0255 M solution of the same analyte? Assume the pathlengths for each measurement are equal. %T = %

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Spectroanalytical Methods

Spectroanalytical methods measure the wavelength and intensity of radiations that are either emitted or absorbed by a molecular or atomic species. These methods are useful for evaluating the electronic or atomic arrangement of the molecules of a given analyte.

Question

### Transcription for Educational Website

**Problem Statement:**

What absorbance value corresponds to 40.2% transmittance (T)?

\[ A = \_\_\_\_ \]

**Further Inquiry:**

A 0.0130 M solution of a certain analyte exhibits 40.2% T at a wavelength of 280 nm. What will the percent transmittance be for a 0.0255 M solution of the same analyte? Assume the pathlengths for each measurement are equal.

\[ \%T = \_\_\_\_ \% \]

**Instructions:**

Calculate the absorbance using the formula:

\[ A = -\log_{10}(T/100) \]

Then, determine the percent transmittance for the 0.0255 M solution by applying Beer-Lambert law, assuming constant pathlength. Describe the methodological steps and calculations clearly.

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