pH is a scale used to measure the acidity or basicity of a solution. It ranges from 0 to 14 and reflects the relative concentration of hydrogen ions (H⁺) and hydroxide ions (OH⁻) in aqueous solutions.

In chemistry, pH (/ piːˈheɪtʃ / or / piːˈeɪtʃ /; pee-AYCH) is a logarithmic scale used to specify the acidity or basicity of aqueous solutions. Acidic solutions (solutions with higher concentrations of hydrogen (H+) …

Dec 5, 2025 · A pH value is the quantitative measure of the acidity or basicity of aqueous or other liquid solutions. The term, widely used in chemistry, biology, and agronomy, translates the values of the …

Explore how and why the pH scale provides a quantitative measure of acidity or basicity—where neutral water has pH 7, and pH values below or above indicate acidic or basic solutions respectively.

Aug 2, 2025 · Key Takeaways: What Is pH? pH measures the concentration of hydrogen ions (H⁺) in a solution and indicates whether a solution is acidic, neutral, or basic. The pH scale typically ranges …

Jul 23, 2025 · pH is a fundamental measurement in chemistry, indicating how acidic or alkaline a substance is. It provides a standardized, numerical value to describe the chemical nature of …

Nov 4, 2025 · What is pH? Acidic and alkaine (or "basic") are two extremes that describe substances, usually liquids or chemicals, just like hot and cold are two extremes that describe temperature. A …

The pH scale is a measure of the acidity or basicity of a solution, ranging from 0 to 14. It is a logarithmic scale that quantifies the concentration of hydrogen ions (H+) in a solution, with lower values …

Jan 28, 2025 · What is the pH Scale? The pH scale helps us measure the acidity, basicity or neutrality of a solution on a scale of 0 to 14, with 7 being the neutral marker. With this, a pH above 7 is basic, …

In order to deal with these large numbers more easily, scientists use a logarithmic scale, the pH scale. Each one-unit change in the pH scale corresponds to a ten-fold change in hydrogen ion …