Titer Determination : Potassium hexacyanoferrate (III)
K3[Fe(CN)6] titre using Sodium thiosulfate (Na2S2O3)
Titer determination is the process of determining the exact concentration (molarity) of a titrant.
Sodium hydrogen sulfite and indigo content in textile dye bath, sulfide determination in wastewaters, glucose, etc. To determine the sample content it is important to know the exact concentration of titrant.
Reaction:
2[Fe(CN)6]3- + 2I- -----> 2[Fe(CN)6]4- + I2
2[Fe(CN)6]4- + 2K+ + 3Zn2+ ----> K2Zn3[Fe(CN)6]2
2S2O3 + I2 -----> (S4O6)2- + 2I-
This note describes the titer determination of potassium hexacyanoferrate (III) with sodium thiosulfate as per United States Pharmacopeia-35 by redox titration.
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