Data:
Hardness
Runs
1
2
3
Vi
15.5 mL
0.0 mL
0.0 mL
Vf
41.9 mL
26.55 mL
26.30 mL
Vused
26.40 mL
26.55 mL
26.30 mL
Vf
28.9 mL
31.9 mL
35 mL
Vused
3.40 mL
3.0 mL
3.10 mL
Calcium
Runs
1
2
3
Vi
25.5 mL
28.9 mL
31.9 mL
Average Volume used
Titration
Hardness
Cal
Objective: A primary standard solution of 0.025 M Na2C2O4 was prepared and used to
standardize a prepared solution of 0.02 M KMnO4. The standardized KMnO4 solution was then
used to standardize a prepared 0.0179 M stock nitrite solution to determine the ac