Acid black dyes NINGBO YUNCAI CHEMICAL CO.,LIMITED , https://www.win-chemical.com
C20=[H + 〕•[OH - 〕=10 -14
If the aqueous solution is neutral, the two concentrations of [H + ] and [OH - ] are equal, that is, [H + ] = [OH - ] = 10 -7 .
For the sake of convenience, the negative value of the logarithm of the hydrogen ion concentration [H+] is used to indicate the hydrogen ion concentration [H+] in the solution, that is, the pH value:
pH=-lg[H + 〕
Therefore, the pH value indicates the hydrogen ion concentration in the solution, which indicates the pH. Neutral when pH = 7, pH > 7 is alkaline, pH < 7 is acidic.
Pulp pH
The pH of the pulp, also known as the pH of the pulp. The pH value refers to the hydrogen ion concentration [H + ] or the hydroxide ion concentration [OH - ] in the slurry. In aqueous solution, when the temperature is 20 ° C, their concentration product is: