The purpose of this lab was to determine solutions have different colors. In the lab we predicted and recorded the wavelength ranges of five solutions. The solutions all appeared to be a certain color because they were absorbing different amount of the the three primary colors, which are Red, Blue, and Green. Sodium Chloride was colorless so it absorbed all three of the primary colors. Cobalt (II) chloride appeared red so it absorbed green and blue. Nickel (II) chloride appeared green, so it absorbed blue and red. Iron (III) chloride appeared yellow, so it absorbed blue. Copper (II) chloride appeared blue so absorbed red and green.

In conclusion, the five solutions had different colors because of the number of photons that were absorbed in the solution along with those that were transmitted as color. A possible error resulted when the square cuvettes were not properly clean before being placed in the Spectrometer. This affected the data because the light may have caught residue from other sources other than the solution itself. In the future to improve the lab, make sure the cells is rinsed thoroughly to avoid skewed results. I would also label each run in Data Studio because it makes it easier to remember which solutions were used and their wavelength range.