Give me correct solution please. The molar absorptivities of the indicatorweak acid HIln (Ka = 1.42 x 10-5) and itsconjugate base In- at 570 were determinedas '(HIn) = 7120 and '(In-) = 961. Theoptical length babsorbance of an unbuffered indicator= 1.00 cm. (a) What is thesolution having total indicator concentration8.0 * 10-5.(b) What is the absorbance of a bufferedindicator solution having total indicatorconcentration 8.0 *10-5 and pH = 6.5

The absorbance of the mixture of two species can be written as: A=εHInbCHIn+εIn-bCIn-

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

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter7: Statistical Data Treatment And Evaluation

Section: Chapter Questions

Problem 7.26QAP

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Question

Give me correct solution please.

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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