The calculation formula for ph is ph=-lg[H+]. ph refers to acidity and alkalinity, which describes the acidity and alkalinity of an aqueous solution. Under thermodynamic standard conditions, an aqueous solution with pH=7 is neutral, those with pH<7 are acidic, and those with pH>7 are alkaline. The ph range is within Between 0 and 14, it is only applicable to dilute solutions. The pH of a solution with a hydrogen ion concentration or a hydroxide ion concentration greater than 1 molL is directly expressed by concentration.

pH value definition

pH value, also known as hydrogen ion concentration index and pH value, is a scale of hydrogen ion activity in a solution, that is, a solution in the usual sense A measure of the degree of acidity and alkalinity, hydrogen ions are cations formed by the loss of an electron from a hydrogen atom, carrying one unit of positive charge. In some cases, they can also form anions with one unit of negative charge, called hydrogen ions (H-).

Under the impact of water molecules, the acid will ionize and emit hydrogen ions. At this time, there will be an excess of hydrogen ions and the solution will be acidic. The more hydrogen ions, the stronger the acidity. Similarly, if a base ionizes in water, it will emit hydrogen ions. Excess hydroxide ions, then the solution is alkaline, and the more hydroxide ions, the fewer hydrogen ions, and the stronger the alkalinity.