Lab Experiment: The Concept Of The Beer-Lambert Law
due to this, one would not be able to get the concentration value of [Cr(NO3)3] because, one would not be able to identify how concentration and absorbance are related and applying this law to the measured absorbance of the equilibrium solution would yield the concentration of the complex. Also without knowing the beer-lambert law, one would not know the outcome of an absorbance vs concentration graph.2 The linear relationship between them is only understood, if one understands the law.
Therefore, the beer-lambert law not only explains the relationship of a solution with light, but it also explains the absorbance and concentration relationship. Without knowing this concept one, would not be able to create the absorbance vs concentration graph as one would not the direct relationship. Due to this, the calculations are needed for this lab would be either inaccurate or …show more content…
However, above a certain concentration level, the absorbance is no longer proportional to the concentration of the absorbing species, i.e. as the concentration increases, the absorbance does not increase or increases very little. Explain what caused this phenomenon and how can we avoid this error.
The beer lambert law describes the absorption behavior of solution based on low amounts of solutes dissolved in a concentration. However, when the concentration of the absorbing species is too high, the relationship between absorbance and concentration is non-linear. the reason is because5;
1. At high concentrations, the interactions with the solvent and other solute molecules change
2. At high concentrations hydrogen bonding interactions occur which interact differently with the other