WOLFRAM|DEMONSTRATIONS PROJECT

Potentiometric Titration of Fe (II)

​
initial concentration
[​
2+
Fe
​] mol/L
0.1
volume
2+
Fe
mL
15
​
Cr
2
2-
O
7
​ mol/L
0.0167
[​
+
H
​] mol/L
0.01
volume
Cr
2
2-
O
7
added (mL)
volume
Cr
2
2-
O
7
110
show equivalence point
This Demonstration shows the process of titration of a solution with an unknown concentration of
2+
Fe
with
Cr
2
2-
O
7
. Titration is based on the reaction:
6
2+
Fe
+
Cr
2
2-
O
7
+14
+
H
⟶6
3+
Fe
+2
3+
Cr
+7
H
2
O
. The titration curve is used to find the unknown concentration of
2+
Fe
.