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On the interaction of potassium iodate with ammonium salts in aqueous solution A quantitative metathetic conversion of KIO3 into NH4IO3 in aqueous medium, which may be expected from the solubility data, can not be achieved. Instead, mixed crystals Kx(NHJ4)1?xIO3 of the perovskite type structure do crystallize, as has been revealed from X-ray powder diagrams. 相似文献
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The degradation of polysilicic acid has been investigated in the region of pH = 1.3–5.5 and 0–65°C. At pH = 3.3 there was found a maximum (18.5 kcal/mol) and at pH = 4.3 a minimum (15.6 kcal/mol) of the activation of this reaction. Nucleophiles and HF accelerate the degradation. 相似文献
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