PH is a measure of the acidity and alkalinity properties of an aqueous SOLUTION, which are determined by the concentration of hydrogen ions (H+) in the solution. Water has the molecular formula of H2O and almost always exists in the stable molecular state of H2O. However, a small proportion also exists in the form of ions KNOWN as hydrogen ions (H+) and hydroxyl ions (OH–), and the balance between these hydrogen ions and hydroxyl ions determines the pH. The solution becomes ACIDIC if there are many hydrogen ions, while it is alkaline if there are many hydroxyl ions.pH Analyzer Working Principle

Because the product of hydrogen ions (H+) and hydroxyl ions (OH–) is constant in any aqueous solution at the same temperature, by measuring the concentration of hydrogen ions (H+) it is possible to determine the degree of acidity or alkalinity. Generally, pH is defined as:

pH=-log10［H+］

The hydrogen ion concentration of a neutral solution is mol/L, that of a 1/10 mol/L HCl solution is mol/L, and that of a 1/10 mol/L NaOH solution is mol/L, which are very small and inconvenient for practical use. Therefore, the inverse of the hydrogen ion concentration represented as a COMMON logarithm is used as the pH.

For a neutral solution, the pH is 7 because [H+] = ; for a 1/10 mol/L HCl solution, the pH is 1 because [H+] = ; and for a 1/10 mol/L NaOH solution, the pH is 13 because [H+] =10-13

PH is a measure of the acidity and alkalinity properties of an aqueous solution, which are determined by the concentration of hydrogen ions (H+) in the solution. Water has the molecular formula of H2O and almost always exists in the stable molecular state of H2O. However, a small proportion also exists in the form of ions known as hydrogen ions (H+) and hydroxyl ions (OH–), and the balance between these hydrogen ions and hydroxyl ions determines the pH. The solution becomes acidic if there are many hydrogen ions, while it is alkaline if there are many hydroxyl ions.pH Analyzer Working Principle

Because the product of hydrogen ions (H+) and hydroxyl ions (OH–) is constant in any aqueous solution at the same temperature, by measuring the concentration of hydrogen ions (H+) it is possible to determine the degree of acidity or alkalinity. Generally, pH is defined as:

pH=-log10［H+］

The hydrogen ion concentration of a neutral solution is mol/L, that of a 1/10 mol/L HCl solution is mol/L, and that of a 1/10 mol/L NaOH solution is mol/L, which are very small and inconvenient for practical use. Therefore, the inverse of the hydrogen ion concentration represented as a common logarithm is used as the pH.

For a neutral solution, the pH is 7 because [H+] = ; for a 1/10 mol/L HCl solution, the pH is 1 because [H+] = ; and for a 1/10 mol/L NaOH solution, the pH is 13 because [H+] =10-13