Question

The experiment is for Spectroscopic Determination of the pKa of Bromothymol Blue

1) Write the Beer-Lambert Law. Which of the terms in Beer’s Law is responsible for the wavelength dependence of absorbance data?

2. If a solution appears blue, what color of light does it absorb?

3) Assuming a pKa of 7.1 for bromothymol blue, over what range it will be an effective acid-base indicator. Show the calculations you used to determine this range.

Answer 1