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[Cu2+] in stock solution- 0.22M

[Cu2+] in Solution 1-0.022M

[Cu2+] in M: Solution 2-0.0044

[Cu2+] in M: Solution 3-0.0066

[Cu2+] in M: Solution 4-0.0088

PART C

beaker 1- mass of complex -0.100g

beaker 2 -mass of complex -0.127g

beaker 3 - mass of complex 0.134g

0.5M NH3 to 2nd beaker distilled water to the first beaker.

absorbance compelx 1 - 0.141

absorbance compelx 2- 0.157

equation from the calibration curve - y=52.0x

question - fill in the data table

Part B: Calibration Curve Mass of CuSO4.5H20 used to prepare stock solution: 0.559 Soln # Volume of Stock Volume of NH3 Total Volume (mL) (mL) (mL) Absorbance 1 1.00 9.00 10.00 0.123 2 2.00 8.00 10.00 0.231 3 3.00 7.00 10.00 0.352 4 4.00 6.00 10.00 0.463 Absorbance [Cu2+], M 2.24E-03 0.123 4.48E-03 0.232 6.72E-03 0.352 8.96E-03 0.463 0.5 y = 52.Ox 0.4 0.3 Absorbance 0.2 0.1 0 0.00E+00 2.00E-03 8.00E-03 1.00E-02 4.00E-03 6.00E-03 [Cu2+), M Fig. 1: Absorbance vs. [Cu2+] Part C: Determination of % Copper in Complex Data Table II (2 pt): Copper Complex Complex 1 Complex 11 23. 28. Mass of Complex (g) 24. 29. Absorbance 25. 30. Calculated [Cu2+] 26. 31. Mass of Cu2+ (g) 27. 32. % Cu2+