 |
 |
18 of 18 |  |
 |
 |
M-18
5.
From your data for the absorption spectra of standard solution #2 determine the molar
absorptivity at 600 nm (0.5 marks)
6.
A nickel compound NiL2 has a molar absorptivity of 1250 M
-1c
m
-1
at 425 nm (
max
).
When a 250.0 mL solution containing 0.00805 g of this compound is analyzed using the
same procedure used in this experiment, an absorbance of 0.155 is observed at 425 nm.
What is the molar mass of NiL2? (0.7 marks)
7.
If this procedure were repeated next year using a 1.80 cm diameter cuvette. Would you
expect the molar absorptivity to increase, decrease or stay the same. Explain your
answer. (0.3 marks)
ASSESSMENT
Performance
(1.0 mark):
Observations Sheet
(1.0 mark):
Laboratory Report
(8.0 marks):
Deductions
(if any):
TOTAL
(10.0 marks):
