Name_______________

StdntNo_____________

1. What happens when a molecule absorbs light?.

2. The absorbance of a 0.0000231 M solution of a compound is 0.822 at
a wavelength of 266 nm in a 1.00 cm cell. Calculate the molar absorptivity.

3. Convert the following absorbance data into percent transmittance

a) 0.375

b) 1.325

c) 0.012

4. What is a calibration curve?

5. Why do we measure percent transmittance and then convert to absorbance?