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This article in SSSAJ

  1. Vol. 35 No. 6, p. 881-883
    Received: Mar 9, 1971
    Accepted: June 14, 1971

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Calcium Complexing and the Enhanced Solubility of Gypsum in Concentrated Sodium-Salt Solutions1

  1. F. S. Nakayama2



Solubility of Gypsum in NaClO4, NaCl, NaNO3, and NaOAc solutions and their mixtures was determined experimentally and theoretically. The dissociation constants of CaCl+, CaNO3+, CaOAc+, NaOAc0, and NaNO30 were computed from the solubility behavior of the solid. The predicted solubility values corresponded closely to the measured values in mixed Na-salt solutions when allowances were made for Ca-complexing.

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