Question

n the spectroscopic analysis of many substances, a series of standard solutions of known concentration are measured to generate a calibration curve. How would you prepare standard solutions containing 10.0, 25.0, 50.0, 75.0, and 100. ppm of copper from a commercially produced 1000.0 ppm solution? Assume each solution has a final volume of 100.0 mL. (ppm = mg solute/kg solution)

100. ppm
75.0 ppm
50.0 ppm
25.0 ppm
10.0 ppm