It was shown by the author [J. Chem. Phys.16,865 (1948)] that water was necessarily a covalent compound, the molecule of which is formed by the neutralization of 2H+1+2&thgr;+O+2; and its specific susceptibility, as we know, was −0.72 (corresponding to the molecular susceptibility −12.96) and that if it were an electrovalent compound its molecule should be formed by the neutralization of 2H+1+O−2, and its specific susceptibility would have been −0.625 (corresponding to the molecular susceptibility −11.25). (Susceptibility values have been multiplied by 106.)In the present paper, we shall show that, in formic acid‐water mixtures, part of the water depending on the weight of formic acid in the mixtures changes its specific susceptibility from −0.72 to −0.625. This indicates that this part of the water in the process of mixing transforms from a covalent to an electrovalent combination.
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