The definition of basic salt: Basic salt is a kind of salt. In addition to metal ions and acid ions, it also contains hydroxide or oxygen ions; it can also be considered as a base. A product in which the hydroxide radicals are not completely neutralized by acid.

Many basic salts have little solubility. However, the composition of some basic salts varies depending on preparation conditions. For example, a mixture of copper sulfate solution and calcium carbonate is heated to 423-443K (i.e. about 150°C) in a closed tube to obtain Cu(OH)?·CuCO?, while Cu(OH)?·2CuCO? is produced at a lower temperature. .

When an acid reacts with a base, the hydroxide ions in the weak base are partially neutralized, and the salt formed is a basic salt. Monobasic bases cannot form basic salts, only dibasic or polybasic bases can form basic salts. The composition and properties of basic salts are complex and diverse. Basic copper carbonate Cu?(OH)?CO3 and basic magnesium chloride Mg(OH)Cl hydroxyapatite Ca10(PO4)6(OH)2 are all basic salts.

Structure:

Salt containing hydroxyl or oxygen groups. General composition: metal + OH + acid radical.

When naming, the hydroxyl group is represented by "hydroxyl" and the oxygen group is represented by "oxidation". The number is represented by one, two or three. "One" can be omitted, such as hydroxycopper iodate Cu(OH)IO ?, Antimony dioxide sulfate (SbO)2SO4 or antimony oxysulfate; the naturally occurring minerals malachite Cu?(OH)?CO? and hydroxyapatite Ca5(PO4)?·(OH), which contain hydroxyl groups The basic salt of antimony dioxide sulfate (SbO) 2SO4 is the basic salt of oxygen-containing groups.

In addition to metal ions and acid ions, basic salts also contain 1 or n hydroxyl or oxygen groups. Basic salts can also be thought of as products in which the hydroxide radical in the base has not been completely neutralized by the acid. Hydroxy salt can be regarded as a double salt composed of metal ions, OH- and other anions. For example, Mg(OH)Cl can be regarded as a double salt composed of Mg2+, OH- and Cl-. Oxygen salts, also known as oxidation salts, can be regarded as double salts composed of metal ions, O2- and other anions. For example, SbOCl can be regarded as a double salt composed of Sb3+, O2- and Cl-.