pH
| Formula / Notation | pH = -log₁₀[H⁺] |
|---|---|
| Also Known As | Hydrogen ion potential, Power of hydrogen |
What is pH?
A measure of the hydrogen ion concentration in a solution, defined as pH = -log₁₀[H⁺]. In pure water at 25°C, [H⁺] = 10⁻⁷ M and pH = 7. Values below 7 are acidic; values above 7 are basic. The pH scale is central to understanding acid-base chemistry in aqueous solutions.
Formula & Notation
Other Names / Synonyms: Hydrogen ion potential, Power of hydrogen
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
A measure of the hydrogen ion concentration in a solution, defined as pH = -log₁₀[H⁺]. In pure water at 25°C, [H⁺] = 10⁻⁷ M and pH = 7. Values below 7 are acidic; values above 7 are basic. The pH scale is central to understanding acid-base chemistry in aqueous solutions.
Clinical diagnostics, fermentation control, enzyme activity optimization, food safety testing, cosmetics formulation, environmental science, acid-base titration endpoint detection.
Handle pH-modifying chemicals with full PPE. Strong acids and bases are corrosive to skin, eyes, and respiratory tract. Neutralize before disposal.
The formula or notation for pH is: pH = -log₁₀[H⁺]