A Chemist Is Tasked with Determining the Concentration of Nickel

question 19

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.

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Definitions:

Radiation

The emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles that cause ionization.

X-Rays

Electromagnetic radiation used in medical imaging to view internal structures of the body, particularly bones.

Fetal Exposure

Refers to the exposure of a fetus to substances, conditions, or influences in the womb that can affect development.

Neural Tube

The precursor to the central nervous system in vertebrates, which later develops into the brain and spinal cord during embryonic growth.