Final answer:
Students use the calibration curve and absorbance values to calculate the concentration of copper in penny samples. The procedure is based on Beer-Lambert law and involves a linear equation derived from the known data plotted on the calibration curve.
Step-by-step explanation:
Students will use the equation of the line from the calibration curve and the absorbance values for each penny solution from the group to calculate the concentration of Cu (g/L) in each penny sample from the group.
The calibration curve represents a plot of known concentrations versus absorbance, which can be used to determine the concentration of copper in the sample by inserting the measured absorbance into the linear equation derived from the curve. The process is based on Beer-Lambert law, where absorbance is proportional to concentration, allowing students to accurately determine the concentration of an unknown sample based on its absorbance.