Calculation method of pH value of single solution;

1, strong acid

Cmol l- 1hna strong acid solution, c (h+) = ncmol l- 1 → ph =-lgnc.

2. Strong alkali

Cmol l- 1b (oh) n strong alkali solution, c (oh-) = ncmol l- 1,

n(H+)= mol L- 1―→pH = 14+LG _ NC .

The calculation method of pH value of mixed solution is as follows:

Where [H+] refers to the activity of hydrogen ions in solution (sometimes written as [H3o+], hydronium ion activity), and the unit is mole/liter. In dilute solution, the activity of hydrogen ions is approximately equal to the concentration of hydrogen ions, which can be approximately calculated.

Extended data pH is one of the most important physical and chemical parameters of aqueous solution.

Natural phenomena involving aqueous solutions. Chemical changes and production processes are related to pH value, so it is necessary to measure pH value in industry, agriculture, medicine, environmental protection, scientific research and other fields.

There is no unit of measurement for pH, and not every unit has a unit of measurement, such as pH, chemical equilibrium constant and ionization equilibrium constant.

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