"On the acid dissociation constant of phosphoric acid ($H_2PO_4 $) "

The taste of the property of things, in the field of chemistry, the acid dissociation constant ($K_a $) is important. For phosphoric acid ($H_2PO_4 $), its $K_a $value is related to many chemical changes.

Phosphoric acid in water is in a dissociative state. Its $K_a $value determines the difficulty of dissociation, and also shows the strength of its acidity. According to the theory of observation of chemistry, the higher the $K_a $value, the more easily hydrogen ions are released in water, and the more acidic it is; conversely, the smaller the $K_a $value, the more difficult it is to dissociate and the weaker the acidity.

Chemists have spent a lot of effort to explore the $K_a $value of phosphoric acid. After repeated experiments and accurate calculations, this important number has been obtained. This $K_a $value is useful in chemical, biochemical and other fields. In chemical industry, it is related to the process of reaction and the generation of products; in biochemistry, it is related to the acid-base balance and material metabolism in organisms.

Therefore, the study of the $K_a $value of phosphoric acid is the important task of chemical research. It has a far-reaching impact on human production and life, and cannot be ignored.