For bromocresol pruple, what is the wavelength of maximum absorbance for the pH

Question

For bromocresol pruple, what is the wavelength of maximum absorbance for the pH < 4.00 solution? What is the wavelength of maximum absorbance for the pH > 10.00 solution? What colors correspond to these wavelengths? How do the observed colors of these solutions relate to the colors at their absorbance maxima?

This is the procedure:

http://www3.chem21labs.com/labfiles/UofC_GL18_Lab.pdf?rf=5204

For bromocresol pruple, what is the wavelength of maximum absorbance for the pH < 4.00 solution? What is the wavelength of maximum absorbance for the pH > 10.00 solution? What colors correspond to these wavelengths? How do the observed colors of these solutions relate to the colors at their absorbance maxima?

This is the procedure:

http://www3.chem21labs.com/labfiles/UofC_GL18_Lab.pdf?rf=5204

Explanation / Answer

ans-) wavelenght of maximum observation for pH<4.00 is 410 nm. colour=purple

wavelenght of maximum observation for pH>10 is approx 620-630 nm, colour= orangish red.

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