Physico-Chemical Investigation on Thiomalate Complex of Thallium (I)

Potentiometric and conductometric studies of the complex formed by Thallium (I) with Thiomalic acid in aqueous medium of 0.1M KNO3 reveal the formation of only one colourless 1 : 1 complex, predominating in the \(p\)H range 9.0-10.5. The stability constants of the complex formed were computed by Calvin and Melchior's extension of Bjerrum's method at three different temperatures. The log K values were found to be 3.58, 3.71 and 3.78 at 30°, 35°, and 40° respectively. The values of ∆G, ∆H and ∆S calculated at 35° are-5.22 kcal/mole-5.75 kcal/mole and -1.7 k. cal/respectively.

Keywords

Synthesis, determination, temperatures

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