pH. Concept and scale

Do you want to know more about pH, what it is and how it is measured?

The online pH simulations on this page will help you better understand what pH is and how it is measured. You will understand what an acidic solution and an alkaline solution is and you will see how the pH of a solution varies depending on the products that form it.

The pH is a fundamental measurement in chemistry and biology that indicates the degree of acidity or basicity of a solution. The concept of pH originated in the early 20th century when the Danish chemist Søren Sørensen proposed the term to describe the concentration of hydrogen ions in solution.

The pH scale ranges from 0 to 14, where 0 indicates the highest acidity and 14 indicates the highest basicity. The neutral point is at 7, which represents a concentration of hydrogen ions equal to that of hydroxyl ions in solution. A pH less than 7 indicates that the solution is acidic, while a pH greater than 7 indicates that the solution is basic. Each pH unit represents a 10-fold change in the concentration of hydrogen or hydroxyl ions.

pH is an important measurement in many scientific fields and industrial applications. In chemistry, pH is used to characterize the acidity or basicity of a solution, which can be critical for the synthesis of new compounds and the understanding of chemical reactions. In biology, pH is critical to the survival and function of cells, as many enzymes and proteins only function in a specific pH range. In medicine, pH is used in diagnostic tests, patient monitoring and drug development. In the food and pharmaceutical industry, pH is crucial to ensure the safety and stability of products. pH is also important in environmental management and water quality conservation.

In summary, the online pH simulations on this page will be extremely helpful in understanding this important concept in chemistry.

Introduction to pH


Test the pH of everyday liquids such as coffee, saliva, and soap to determine if they are acidic, basic, or neutral. Investigate how adding more of a liquid or diluting it with water affects the pH.

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pH Scale


Test the pH of things like coffee, saliva, and soap to determine if each is acidic, basic, or neutral. Display the relative number of hydroxide ions and hydrogen ions in solution. Switch between logarithmic and linear scales. Investigate whether changing the volume or diluting with water affects the pH. Or you can design your own liquid!

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