Ammonium dihydrogen orthophosphate Total class of inorganic acids CAS NO.7722-76-1

The acidity of inorganic acids is affected by the nonmetallic properties and atomic radius of non-metallic elements. For example, in the same period, the acidity of the oxygen-containing acid of the non-metallic element gradually increases from left to right, because the non-metallic character of the non-metallic element gradually increases, the ability to attract electron pairs increases, and the atomic radius gradually decreases, that is, the degree of bias of the electron pairs between R-O to the R side increases. The degree of polarization of hydrogen atoms in the oxygen-containing acid molecules increases, and the degree of ionization increases under the action of water molecules. Similarly, the acidity of the oxygen-containing acids of the same main group elements gradually decreases from top to bottom, because the nonmetallic properties of the R element gradually weaken from top to bottom, the atomic radius of the R element gradually increases from top to bottom, and the ability of the R atom to attract electron pairs gradually decreases.

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