Acid salts are products in which the hydrogen ions in polybasic acids are partially neutralized by a base. For example, the basic salt of NaHSO4

is a product in which the hydroxide ions in the polybasic base are partially neutralized by acids. For example, the product of complete acid-base neutralization of Cu2(OH)2CO3 is a normal salt. For example, basic copper carbonate Na2so4

Taking acid salts and normal salts as examples, for example: dibasic acid sulfate H2SO4

Each sulfuric acid molecule is ionized in water to produce 2 hydrogen ions. Equation:

H2SO4 === 2H^ SO4^2-

When sodium hydroxide is added dropwise, there is insufficient sodium hydroxide at first, and the following reaction occurs:

NaOH H2SO4 === NaHSO4 H2O One hydrogen ion in NaHSO4 has not been neutralized, so it is an acid salt

Continue to add dropwise, and the hydroxide ions continue to react with hydrogen ions:

NaOH NaHSO4 === Na2SO4 H2O At this point, the hydrogen ions are completely neutralized, and Na2SO4 is a normal salt

We can conclude that n-basic acids can form n kinds of salts, among which (n-1) kinds of acids formula salt.

Note: Not all acid salts are acidic in aqueous solutions. For example, NaHCO3 aqueous solution is weakly alkaline because the degree of hydrolysis of HCO3^- to produce hydroxide ions is greater than the degree of ionization to produce hydrogen ions

2.

Completely ionized in water An acid is a strong acid (e.g. HNO3) and an acid that partially ionizes in water is a weak acid (e.g. HAc).

A base that is soluble in water and completely ionized in water is a strong base (such as NaOH), and a base that is insoluble in water or partially ionized in water is a weak base (such as NH3?6?1H2O).