0.25 g of CuSO4 was added to 25 mL of deionized water. What wavelength of light would you recommend to characterize the solution's UV-Vis absorbance?
Assuming that at this wavelength, the molar absorptivity of CuSO4 is 1.8 M-1cm-1 and the path length is 1 cm, calculate the percentage transmittance of the measured solution.