Red Food Test Lab Report

Abstract

This experiment included four sub experiments in which three measured light passing through a substance and one determining a substance. The first experiment included measuring the wavelength of light in different elements. This determined different elements produce different wavelengths. The second experiment included spraying an unknown substance into a Bunsen burner and determining what it was via the color change. This showed that different substances can be determined by which color they burn. The third experiment included measuring the light that passed through a certain color. This determined that distinct colors have certain amounts of light that can pass through. The fourth experiment was to dilute a solution of red food

All three gases showed colors with green and red while the third column differentiates. The shortest wavelength measured was purple, with 440 nm, from neon. The highest wavelength measured was red, with 620 nm, from argon. This paragraph should be re-written after the table is fixed. Though these results were similar, there were two wavelengths that differed from the rest of the results. Purple emerged from neon, being the lowest measurement, and yellow from helium. The result of the being that argon was the most visible gas to see and measure because of its most concentrated colors red and

All these compounds contained metals so colors could be seen through their evaporation process. No two colors were the same other than LiCl and SrCl2 being similar. The unknown compound was the same orange color as CaCl2 , concluding this was the same compound. Each compound that contains a metal will show a distinct color once it evaporates in high heat. Through trial and error, one can determine which compound was unknown through

the color presented. An error that could occur is the blue color of the flame interfering with the true color of the compound.

Figure 1. Absorption Spectra of Food Coloring Solutions

The results of this experiment concluded as red food coloring measuring 516.8nm at 10ppm. This graph shows the electromagnetic spectrum of each food coloring. Yellow food coloring measuring 425.7nm at 500ppm. Blue food coloring measuring 629.2nm at 1000ppm. The blue food coloring had the highest spectrum of all the colors measured. Through placing fixed solutions into a spectrophotometer, light absorbance can be determined for each color. Being careful with this process, a few errors that could occur would be cross contamination of the solutions or fingerprints on the cuvettes. By measuring these colors, the blue food coloring had the highest