Three solutions of Triblu indicator, all of equal concentration, were made at pH 1, pH 6 and pH 10. The pH 1 solution had an absorbance at 620 nm of 0.202, while the pH 10 solution had an absorbance of 0.489. If Triblu indicator has a pka of 5.0, what would the absorbance of the pH 6 solution be at 620 nm? Answer to three decimal places.

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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Three solutions of Triblu indicator, all of equal
concentration, were made at pH 1, pH 6 and
pH 10.
The pH 1 solution had an absorbance at 620
nm of 0.202, while the pH 10 solution had an
absorbance of 0.489.
If Triblu indicator has a pka of 5.0, what
would the absorbance of the pH 6 solution be
at 620 nm?
Answer to three decimal places.
Transcribed Image Text:Three solutions of Triblu indicator, all of equal concentration, were made at pH 1, pH 6 and pH 10. The pH 1 solution had an absorbance at 620 nm of 0.202, while the pH 10 solution had an absorbance of 0.489. If Triblu indicator has a pka of 5.0, what would the absorbance of the pH 6 solution be at 620 nm? Answer to three decimal places.
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