DRAFT: This module has unpublished changes.

The purpose of this experiment is to determine the concentration of a colorful solution. The ability of solutions to absorb light is characterized by two physical quantities, which are transmittance (T) and absorbance (A). We use two separate equations to determine T and A. To determine T we use T=I/Io and to determine A we use A=-logT=-log(I/Io). Absorption depends on wavelength and that is what gives off a specific color. The photons that are transmitted are perceived as the solutions color.

 

In this experiment we will prepare five solutions of CuSO4 of different concentrations. CuSO4 is blue, meaning that it absorbs light in the visible wavelength region. We will measure the absorbance of five solutions and construct a calibration curve to show the relationship between absorbance and concentration. We will determine the concentration of CuSO4 solution using the calibration curve.

DRAFT: This module has unpublished changes.