Problem- The following is a description of the preparation of an unknown sample: 1. 0.0519g of an unknown Fe2 salt is measured and added to a 25 mL volumetric flask. 1.0 mL of 6 M HCl is added before diluting to volume. 2. 1.0 mL of the solution prepared is transferred to a 100 mL volumetric flask. 1.25 mL of buffer and 5.0 mL of ferrozine is added before diluting to volume with DI water. The absorbance of the solution in 2 is measured to be 0.895. Report all answers to 3 sig figs. The 0.895 absorbance corresponds to 0.06 concentrations. Calculate the concentration of solution 2? and solution 1? Calculate the number of millimoles of the unknown solution prepared by adding 0.0519 g to 25mL and calculate the molar mass of the unknown?
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