Question

3. In Step 7, a student's linear regression analysis yielded an R' value of 0.862. Suggest three reasons why this student's absorbance versus concentration data was so nonlinear.

Answer 1

A=ECI Absorbance Vs Concentration flot comes out as linear as according to Lambert- Beer's law. But studert did not get a linear flot. This could be because of deviation from lambert-Beer's law; i) The concentration of solution might be too high. Because the linear flotis only observed in delete solutions. i There could be some sort of interactions between solute particles. Because Beer's law is based on struct no interaction. 111) Solute might have undergone dissociation or association iv) Possible use of non-monochromator of folychromator source of light.