Long-chain Phosphates. II. Reactions of Crystalline Sodium Metaphosphates with Solutions of Various Metal Salts

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概要

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• Three kinds of crystalline sodium metaphos-phates with a long-chain structure, NaPO<SUB>3</SUB>-II, NaPO<SUB>3</SUB>-III and NaPO<SUB>3</SUB>-IV, were prepared, and the cation exchange reactions of the solid sodium metaphosphates with aqueous solutions of bivalent metal salts, calcium, magnesium, iron(II), cobalt(II), nickel(II) and copper(II), were investigated. The tendency of the cation exchange of the sodium metaphosphates for these metal ions, except for copper (II), decreases in the order:<BR>NaPO<SUB>3</SUB>-IV\gtrapproxNaPO<SUB>3</SUB>-III>NaPO<SUB>3</SUB>-II<BR>which coincides with the order of the tendency of the hydration of the sodium metaphosphates. Only in the case of copper(II) ion were large amounts of the sodium metaphosphates dissolved in the course of the reactions.

• 社団法人 日本化学会の論文

著者

• Ohashi S.

  Department of Medicine, Fujita Gakuen University School Medicine

• Nakamura Takashi

  Department Of Cardiology Saiseikai Shiga Hospital

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