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lab 9 in lab

# lab 9 in lab - Data Table A Absorbances of Standard Cu2...

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Data Table A. Absorbances of Standard Cu 2+ Solutions Standard Cu 2+ Solutions Absorbance at ~600 nm (enter to the 0.001) 1: 5.0 x 10 -4 Cu(NO 3 ) 2 0.043 2: 1.0 x 10 -3 Cu(NO 3 ) 2 0.060 3: 5.0 x 10 -3 Cu(NO 3 ) 2 0.152 4: 1.0 x 10 -2 Cu(NO 3 ) 2 0.233 Equation of Trendline (please enter to 3 sig figs) y = 21.7 x+ 0.0260 R 2 = 0.982 Data Table B. Absorbances of Solutions Saturated with Cu(IO 3 ) 2 Cu(IO 3 ) 2 Saturated Solutions Absorbance at ~600 nm (enter to the 0.001) [Cu 2+ ] (enter to 3 sig fig) [IO 3 1- ] (enter to 3 sig fig) A: 1.0 x 10 -2 M KIO 3 .033 3.23e-4 M .0106 M B: 5.0 x 10 -3 M KIO 3 .043 7.83e-4 M .00657 M C: Deionized Water .030 1.84e-4 M 3.68e-4 M D: 1.0 x 10 -3 M Cu(NO 3 ) 2 .038 5.53e-4 M -8.94e-4 M E: 5.0 x 10 -3 M Cu(NO 3 ) 2 .027 4.61e-5 M -.00991 M Data Table C. Calculated K sp and Solubilities of Cu(IO 3 ) 2 Cu(IO 3 ) 2 Saturated Solutions Calculated K sp (enter to 3 sig fig) Calculated Solubility (enter to 3 sig fig)

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A: 1.0 x 10 -2 M KIO 3 3.63e-8 3.21e-4 M B: 5.0 x 10 -3 M KIO 3 3.38e-8 7.84e-4 M C: Deionized Water 2.49e-11 1.84e-4 M D: 1.0 x 10 -3 M Cu(NO 3 ) 2 4.42e-10 -4.47e-4 M E: 5.0 x 10 -3 M Cu(NO 3 ) 2 4.53e-9 -.00495 M Average 1.50e-8 ------------ Question 4b. The literature value for the K sp of Cu(IO 3 ) 2 is 6.85 x 10
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