pH strips

Background

Substances with the property to change color when they come into contact with an either acidic or basicsolution are called pH indicators. This is used in pH strips that changes color when they come into contactwith hydrogen ions (H+) and hydroxide ions (OH-).

Usually, pH strips are bought in packages with either 50 or 100 strips. pH strips are most useful for demonstration experiments or experiments where accuracy of the measured pH is of minor importance.

Using pH strips is simple. The strip is simply submerged in the aqueous solution and the reading of pH is done by comparing the color on the pH strip with the color on the package that the pH strips came in.

The accuracy of any pH reading is within 0.5 pH units.


Web resources

Commercial company selling pH strips

pH meter pH strips BackgroundpH meters have been used since 1936 when they were invented by the Danish company Radiometer.In contrast to many other measuring devices pH meters do not measure concentrations, rather they measure activities. Tobe more specific the pH meter does not measure the concentration of hydrogen ions.pH meters are used to ...

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