Beers Lab

This was again a pretty quick one day lab for me. We used a nickel nitrates solution and water. Then we had 3 different unknown nickel nitrate solutions. We had 5 test tubes and put a certain amount of solution and a certain amount of water in it. The first tube had 2 mL of 0.40 M NiSO4, and 8 mL of distilled water. The second tube had 4 M NiSO4, and 6 mL of Distilled water. The third tube had 6 mL of 0.40 M NiSO4, and 4 mL of distilled water. the fourth had 8 mL os 0.40 M NiSO4, with 2 mL of distilled water and five with ten mL of 0.40 M NiSO4, with no distilled water. After we did all of that, we put some of the solutions into Cuvettes and then into the colorimeter. What the colorimeter did was tell how much light would reflect from the solution. The darker the solution, the more absorbency it had and not much light could pass through. But the lighter the solution, the more light could go through it, because it had a lower absorbency. When we put the Cuvettes in the colorimeter, it graphed and told us on the computer the absorbency.
       We did this lab based off of Beer's Law. Beer's Law states that the absorbance is directly proportional to the concentration of a solution. If you were to plot the absorbance versus the concentration, the graph would be n a pretty straight line.