Lab Sec.
Date
A. A Set of Standard Solutions to Establish a Standardization Curve
Molar concentration of Fe(NO?),
Standard Solutions
Blank
Molar concentration of NaSCN
1
2
3
4
5
0
1
2
3
4
5
A.1. Volume of NaSCN (mL)
A.2. [SCN?] (25.0 mL)
A.3. [FeNCS²?] (mol/L)
A.4. Absorbance, A
-0.127
0.062
0.203
0.453
0.653
0.778
*Calculation for Standard Solution 1.
A.7. Plot data of A versus [FeNCS²?]. Instructor's approval
B. Absorbance for the Set of Test Solutions
Molar concentration of Fe(NO?),
Molar concentration of NaSCN
Test Solutions
6
7
8
9
10
B.1. Volume of Fe(NO?), (mL)
5
5
5
5
5
B.2. Moles of Fe³?, initial (mol)
B.3. Volume of NaSCN (mL)
B.4. Moles of SCN?, initial (mol)
B.5. Absorbance, A
0.25
0.165
0.292
0.912
0.545
*Calculation for Test Solution 6.
Name