Conductometric titration of thiosulfate using new-type conductivity cells |
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Authors: | Forizs E Muzsnay C |
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Institution: | Department of Chemistry, Babe?-Bolyai University, Cluj-Napoca, Romania. |
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Abstract: | The conductometric titration of thiosulfate with silver ions using non-conventional conductivity cells is described. For this purpose conductivity cells with different cell constants and electrode constructions, equipped with silver, amalgamated silver, stainless-steel and polished platinum electrodes were used. Two well-resolved break-points were observed at 1:1 and 2:1 silver/thiosulfate stoichiometries. Accurate conductometric determinations can be made, using the second break-points of the titration curves as equivalence points, in the range of thiosulfate concentrations 10(-4)-10(-2) M. Reverse titrations are less accurate. |
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