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The molar absorptivities of the indicator weak acid HIn (Ka = 1.42 x 10-5) and its conjugate base In- at 570 were determined as "(HIn) = 7120 and "(In-) = 961. The optical lengthb = 1.00 cm. (a) What is the absorbance of an unbuffered indicator solution having total indicator concentration 8.0 * 10-5. (b) What is the absorbance of a buffered indicator solution having total indicator concentration 8.0 *10-5 and pH = 6.5

The molar absorptivities of the indicator weak acid HIn (Ka = 1.42 x 10-5) and its conjugate base In- at 570 were determined as "(HIn) = 7120 and "(In-) = 961. The optical lengthb = 1.00 cm. (a) What is the absorbance of an unbuffered indicator solution having total indicator concentration 8.0 * 10-5. (b) What is the absorbance of a buffered indicator solution having total indicator concentration 8.0 *10-5 and pH = 6.5

Chemistry
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
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The molar absorptivities of the indicator weak acid HIln (Ka = 1.42 x 10-5) and its conjugate base In- at 570 were determined as '(HIn) = 7120 and '(In-) = 961. The optical length b absorbance of an unbuffered indicator = 1.00 cm. (a) What is the solution having total indicator concentration 8.0 * 10-5. (b) What is the absorbance of a buffered indicator solution having total indicator concentration 8.0 *10-5 and pH = 6.5
Transcribed Image Text:The molar absorptivities of the indicator weak acid HIln (Ka = 1.42 x 10-5) and its conjugate base In- at 570 were determined as '(HIn) = 7120 and '(In-) = 961. The optical length b absorbance of an unbuffered indicator = 1.00 cm. (a) What is the solution having total indicator concentration 8.0 * 10-5. (b) What is the absorbance of a buffered indicator solution having total indicator concentration 8.0 *10-5 and pH = 6.5
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