Tag Archives: indicator

Selecting an Indicator for a Redox Titration

The most important class of indicators for redox titrations are substances that do not participate in the redox titration, but whose oxidized and reduced forms differ in color. When we add a redox indicator to the titrand, the indicator imparts … Continue reading

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Indicators for Complexation Titrations

Most indicators for complexation titrations are organic dyes—known as metallochromic indicators—that form stable complexes with metal ions. The indicator, Inm–, is added to the titrand’s solution where it forms a stable complex with the metal ion, MInn–. As we add … Continue reading

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Visual Indicators for Acid-Base Titrations

The illustration below shows the relationship between pH and an indicator’s color. The ladder diagram defines pH values where each of the indicator’s two forms the weak acid form, HIn, which in this example is yellow the weak base form, … Continue reading

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