Investigation 1 – PostLab
Determine the concentration of the unknown solution by using the absorbance data to create a concentration curve. Scientists that perform spectrophotometric work create a concentration curve by plotting the concentration of known solutions as compared to the absorbance of unknown solutions.
Complete the Analysis Questions in your SDR then discuss them as a class.
- Study the concentration curve. What is the concentration of food coloring in the unknown sample?
- What do you think a transmittance graph would look like? Support your predictions.
Complete the Focus Question in your SDR then discuss it as a class.
- What is the relationship between the absorption and transmission of light through transparent substances?