Thermo Fisher Scientific CyberScan pH 1500 - Manual (Page 48)

Instruction Manual CyberScan pH1500
46
10 pH THEORY
The measurement of pH plays an important role in quantifying and
controlling acidity and alkalinity levels for industry and research. pH is
a measure of the acidity or alkalinity of a solution and can be
represented by this equation:
pH= -log [H+]
With [H+] representing the concentration of hydrogen ions in the
solution. pH is sometimes referred
to as power of the hydrogen ion in a solution.
By using a pH meter, you can most precisely determine exact pH
levels of solutions. For example, rather than saying that lemon juice is
quite acidic, you can say that lemon juice has a pH of 2.4. an exact
pH value is often required to control or optimise acidity levels for
manufacturing processes or for basic research.
pH values generally range from 0 to 14, with a pH value of 7 being
the neutral point, or the value of pure water. The pH values above the
neutral point represent increasing alkalinity, whereas pH values
below the neutral point represent increasing acidity.