Ionic Product of Water
| Formula / Notation | [H+][OH−] = Kw = 1.0×10⁻¹⁴ at 25°C |
|---|---|
| Also Known As | Ionic product of water, Kw, Autoprotolysis constant |
What is Ionic Product of Water?
The equilibrium constant for the autoionization of water: Kw = [H⁺][OH⁻] = 1.0 × 10⁻¹⁴ at 25°C. This relationship links [H⁺] and [OH⁻] concentrations in any aqueous solution and is the basis for the pH scale.
Formula & Notation
Other Names / Synonyms: Ionic product of water, Kw, Autoprotolysis constant
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
The equilibrium constant for the autoionization of water: Kw = [H⁺][OH⁻] = 1.0 × 10⁻¹⁴ at 25°C. This relationship links [H⁺] and [OH⁻] concentrations in any aqueous solution and is the basis for the pH scale.
Foundation of all acid-base calculations in aqueous solution. Deriving Henderson-Hasselbalch equation. Calculating pH of salt solutions. Understanding physiological pH (body temperature shifts neutral pH). Corrosion calculations. Water treatment chemistry.
Theoretical constant. Understanding Kw is essential for correctly calculating acidic or basic concentrations, preventing errors in solution preparation that could create dangerously corrosive solutions.
The formula or notation for Ionic Product of Water is: [H+][OH−] = Kw = 1.0×10⁻¹⁴ at 25°C