410 IAC 7-21-23
410 IAC 7-21-23 "pH" defined
Cite as Ind. Admin. Code tit. 410, r. 7-21-23
Sec. 23. "pH" means the symbol for the negative logarithm of the hydrogen ion concentration, which is a measure of the degree of acidity
or alkalinity of a solution. Values between zero (0) and seven (7) indicate acidity, and values between seven (7) and fourteen (14) indicate alkalinity.
The value for pure distilled water is seven (7), which is considered neutral.