The questions in the lab procedure handout do not need to be handed in.
Do these pre & post lab questions posted on the web instead

1. A dye solution allows 50.0% of the incident light to pass through.
What is the absorbance of this solution?







2. A dye solution has an absorbance of 1.00 measured in a spectrophotometer.
What is the percent transmittance of this solution?







3. If the concentration of the dye in question #2 above is reduced to 1/4
of its original concentration, what will be the absorbance reading now?







4. What are complementary colors?







5. In instrumental spectrophotometry, what precautions should be observed
in order to insure that the absorption of light by the glass tubes will be the same
for all cells?