For use in analytical chemistry, sodium thiosulfate solutions must be carefully prepared. In particular, the solutions must

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For use in analytical chemistry, sodium thiosulfate solutions must be carefully prepared. In particular, the solutions must be kept from becoming acidic. In strongly acidic solutions, thiosulfate ion disproportionates into SO2(g) and S8(s).

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Show that the disproportionation of S2O32–(aq) is spontaneous for standard-state conditions in acidic solution, but not in basic solution.

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General Chemistry Principles And Modern Applications

ISBN: 9780132931281

11th Edition

Authors: Ralph Petrucci, Jeffry Madura, F. Herring, Carey Bissonnette

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