Determine the molar absorptivity of the basic form of bromocresol green at 445 and at 615 nm. Show your calculations below.  These values should also appear in the appropriate cells in your spreadsheets.

102 Exercise 8 Report Form:  Acids and Bases – Indicators and the Determination of pH by Spectrophotometry

(2 points) Determine the molar absorptivity of the acidic form of bromocresol green at 445 nm and at 615 nm. Show your calculations below.  These values should also appear in the appropriate cells in the spreadsheets you will also prepare (see manual).

1. (1 point) Determine the molar absorptivity of the basic form of bromocresol green at 445 and at 615 nm. Show your calculations below.  These values should also appear in the appropriate cells in your spreadsheets.
2. (1 point) What would have been the outcome of these experiments if the wavelengths chosen were 321 nm and 515 nm?
3. (2 points) Calculate [HIn] and [In^–] for your solutions by solving the pair of simultaneous equations by hand. Show your calculation for one of your unknown solutions below.
4. (9 points) Attach three spreadsheets to this cover sheet showing the calculation of the pH of the unknown solutions assigned. Spreadsheets must be complete with Henderson-Hasselbalch equation calculations clearly labeled and results readily identified with text and appropriate boxes.