A sample volume of 0.5mL was pipetted into a beaker, treated withreagents to produce an indigo color, transferred to a volumetricflask and diluted to 25 mL.The concentration of Fe was found to be2.856 *10^-4 mole Fe/L. Calculate the molar concentration and the ug Fe/mL in the original acid mine sample. Then calculate the pFefor the original sample.