Data Table A. Calibration Curve of Cu2 Solutions and UnknownStock Cu2 solution concentration .498 MWavelength 635 nm2 mL Actual Volume of Cu2 mL Target Volume of H2O mL Actual Volume of H2O mL [Cu2 ?] M (calculated) Absorbance at ~660 nm (measured to the 0.0001 decimal place) 1 1.50 1.50 6.50 6.50 .0934 .2347 2 3.00 3.00 5.00 5.00 .187 .4759 3 4.50 4.50 3.50 3.50 .280 .7445 4 6.00 6.00 2.00 2.00 .374 .9021 Equation of Trendline: y = 2.48 x ?R2 = .997What is the concentration of Cu2 in your unknown solution? Record this concentration below. (Hint: Use the absorbance of the unknown and the trendline to solve for the Cu2 concentration.)Unknown # 1Absorbance at ~660 nm (measured) .4616[Cu2 ?] (calculated) ? MWhat is the [Cu2 ]?
