Mg2 forms a stable colorful complex, which has an absorption maximum at 636.3nm. This result allows it to be quantitatively determined by UV-Vis spectroscopy on a volcano rock sample. For the calibration curve, they prepared a series of dilutions of different concentrations by adding the necessary amount of reagent to form the colorful complex. After enough time had passed to reach the equilibrium of the reaction (determined previously), they were analyzed at 636.3nm and the following results were obtained: The volcano sample Mg2 + was extracted, 5mL of the resulting solution were transferred to a 25mL volumetric flask, the same volume was added as to the standard solutions of the reagent to form the complex and the capacity is with the solvent already used. The response obtained for the sample at 636.3nm is 0.1382, Determine the concentration of Mg2+ in the test sample a. 5.8E5 b. 2.4E5 c 28E3 d. 6.4E5 e. 3.4E3