pH
| Formula / Notation | pH = -log₁₀[H⁺] |
|---|---|
| Also Known As | Hydrogen ion concentration, Acidity, Basicity |
What is pH?
A logarithmic scale measuring the acidity or alkalinity of an aqueous solution: pH = -log[H⁺]. A pH of 7 is neutral (at 25°C), below 7 is acidic, and above 7 is basic. The scale typically ranges from 0 to 14. Changes of one pH unit represent a 10-fold change in hydrogen ion concentration.
Formula & Notation
Other Names / Synonyms: Hydrogen ion concentration, Acidity, Basicity
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 logarithmic scale measuring the acidity or alkalinity of an aqueous solution: pH = -log[H⁺]. A pH of 7 is neutral (at 25°C), below 7 is acidic, and above 7 is basic. The scale typically ranges from 0 to 14. Changes of one pH unit represent a 10-fold change in hydrogen ion concentration.
Quality control in food and beverage production. Water treatment and purification. Blood pH monitoring in medicine (normal blood pH: 7.35–7.45). Agriculture: soil pH determines nutrient availability. Swimming pool maintenance. Chemical manufacturing. Pharmaceutical formulation. Environmental monitor…
Extremely acidic solutions (pH 0–2) and extremely basic solutions (pH 12–14) are corrosive and can cause severe burns. Always wear gloves and eye protection when working with pH-altering chemicals. Neutralize acid spills with sodium bicarbonate. Buffer solutions should be stored carefully.
The formula or notation for pH is: pH = -log₁₀[H⁺]