A student uses a UV-VIS spectrometer to measure the absorbance of several CuSO4 solutions at different concentrations as shown in the graph below: 1. With what you saw in the Beer's Law simulation, determine the absorbance of a solution of CuSO4 at 0.250M ? (Hint: Find the slow of the line first) (2pts) 2. Explain why using this technique would work for a solution made from CoCl2 (shown at left) but not for a solution made from NaCl (shown at right)? (2pt)