pH

See also: ph, Ph, PH, .ph, P&H, and pḥ

㏗ U+33D7, ㏗ SQUARE PH ← ㏖ [U+33D6] CJK Compatibility ㏘ → [U+33D8]

Translingual

Etymology 1

Originally introduced in 1909 by S. P. L. Sørensen, using the notation p_H⁺ for what he called the “hydrogen ion exponent” (Wasserstoffionenexponent ) of a solution. He may have chosen the symbol p arbitrarily; another suggestion is that it abbreviates German Potenz (“power”). The “H” is the international chemical symbol for the element hydrogen.

Symbol

pH

1. (chemistry) Measure of the acidity (low pH) or basicity (high pH) of an aqueous solution, equal to the negative logarithm of the concentration of hydronium ions in molars

Coordinate terms

• pOH

Etymology 2

Symbol

pH

1. (metrology) Symbol for picohenry, an SI unit of electrical inductance equal to 10⁻¹² henrys.

See also

• pK

Egyptian

Romanization

pH

1. Manuel de Codage transliteration of pḥ.