Determine the dilution factor for your diluted unknown U1 based on how you prepared the solutions in Part A. Record this on your report sheet in Part D #4.
part A
|
1. Concentration of Known NiCl2 Stock Solution |
___500________ mM |
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|
|
Tube Number |
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|
|
Blank |
#1 |
#2 |
#3 |
#4 |
#5 |
|
2. Volume of Known NiCl2 Stock Solution Pipetted Into Tube |
0.00 mL |
1.50 mL |
3.00 mL |
4.50 mL |
6.00 mL |
7.50 mL |
|
3. Volume of Distilled Water Pipetted Into Tube |
11.00 mL |
9.50 mL |
8.00 mL |
6.50 mL |
5.00 mL |
3.50 mL |
|
4. Total Volume of Solution In Tube |
11.00 mL |
11.00 mL |
11.00 mL |
11.00 mL |
11.00 mL |
11.00 mL |
|
5. Diluted Concentration of NiCl2 In Tube |
----------- |
68.2 mn |
136mn |
204mn |
273mn |
341mn |
|
1. Equation for the Best-Fit Straight Line |
Y=3822x+4.7446 |
|
2. Absorbance at λmax for Diluted Unknown |
0.87 |
|
3. Concentration of NiCl2 in Diluted Unknown |
25.693 mM |
Determine the dilution factor for your diluted unknown U1 based on how you prepared the solutions in Part A. Record this on your report sheet in Part D #4.
Using a concentrated solution of a given compound, different concentration of the same solution can be made by addition of distilled water to the concentrated solution. A specific concentration solution can be prepared by calculating the required stoichiometry.
The volume of the concentrated nickel chloride used is:
|
Test tube number |
1 |
2 |
3 |
4 |
5 |
|
Volume of NiCl2 (in mL) |
1.5 |
3 |
4.5 |
6 |
7.5 |
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