The law that deals with beer, yet it is not the alcoholic kind. Beer's law is a linear equation that relates absorbance to concentration based on a constant coefficient that is defined for the given substance. The graph above is a screenshot from LoggerPro where we tracked absorbance levels in our experiment. Why? Beer's Law is used to determine the concentration of a solution.
Beer's Law Symbols A= eBC A = Absorbance e = constant B = pathlength of the cuvette C = Concentration
To the left of me is a picture that clearly states that this blog isn't about alcohol. Beers Law states that the quantity of light absorbed by a substance dissolved in a non-absorbing solvent is proportional to the concentration of the substance dissolved. Beers Law can also be called the Beer-Lambert law or the Bouguer-Beer law. Beer’s law is a concept in Chemistry that we all know, but the thing is that you don't know that you know it. It states that the darker a solution’s color is, the higher concentration of a substance that solution has. Beer's law is written in the form A=ecl, where A is the absorbance, c is the concentration in moles per liter, l is the path length in centimeters, and e is a constant of proportionality known as the molar extinction coefficient. Beers law is used for dilute solutions.
For the experiment my group and I did an Colorimeter Lab. We also had to include LoggerPro in the experiment to track our results. The main tool that we used for this lab was a Colorimeter. A Colorimeter is a devicethat uses light to test the absorbency of a solution sample. By using this it would give us the concentration, but before we could start we had to calibrate the sensor which was pretty easy once we figured out how to do it. Once it was calibrated and plugged in to the computer we then had to prepare six unknown solutions. The six solutions are used for comparison, so that we can see the concentration of our unknown substances, which this is the whole purpose of the lab which is to test unknown substances and see their concentrations by using light. The six solutions were various amounts of distilled water and Nickel (II) Sulfate (NiSO4). As hard as it sounds that is all you have to do. By using Beer's Law you can find concentrations of all kinds of unknown solutions. This law is cool because you can use light to find the concentration of an unknown substance.