Chemistry: Beer's Law Lab

A laptop was set up with LoggerPro and the spectrophotometer was connected. The cuvette was filled with distilled water to calibrate the instrument. The absorbance of the water at 510 nm was indeed found to be 0. Five beakers were set out and labelled with paper towel A, B, C, D, and E. About 0.20 g, 0.41 g, 0.60 g, 0.81 g, and 1.01 g of CoCl2 • 6H2O were measured out and placed in the beaker. The was solid was red. Approximately 25 mL of distilled water were poured into each beaker. The liquids and solids were stirred until the solid was dissolved and the liquid was clear and red. A pipette was used to fill the cuvette with the liquid for each beaker separately and placed inside the spectrophotometer. The absorbance was read and recorded. The second part of the experiment consisted of three samples of 0.63 g, 0.80 g, and 0.99 g of CoCl2 • _H2O being added to three different beakers and the same process as above was repeated for samples those three samples.