Abstract
Potentiometric titration of potassium iodide with potassium iodate solution by the iodine-cyanide method was studied. The titration curve showed a distinct just corresponding to the reaction I--2e→I+.The optimum conditions for the titration were as follows. Concentration of hydrochloric acid and potassium cyanide at the end point were respectively 11.5M and 0.3M. Temperature was 15°C. Titration rate was 0.2 ml per min. The reproducibilities were higher than 99.6% for 0.140.0028M potassium iodide solution.
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