A Chemist Is Tasked with Determining the Concentration of Nickel

Short Answer

A chemist is tasked with determining the concentration of nickel for a water sample drawn from a well next to a nickel mine.To analyze the sample using atomic absorbance spectroscopy (AAS),she prepares six samples (0-5)by adding 10.00 mL well water to a 50.00-mL volumetric flask,then adding an increasing volumes of 25.00-ppm nickel solution,diluting the resulting solution to 50.00 mL with 0.1 M HNO₃.Following AAS analysis,a graph of absorbance versus ppm nickel standard gave a best-fit line y = 0.0428x + 0.0487.Calculate the ppm nickel in the well water sample.