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

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)

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