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Tag Archives: end point
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
Posted in Illustration
Tagged end point, equivalence point, indicator, titration curve, titrimetry
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Spectrophotometric Titrations
If at least one species in a complexation titration absorbs electromagnetic radiation, we can identify the end point by monitoring the titrand’s absorbance at a carefully selected wavelength. For example, we can identify the end point for a titration of … Continue reading
Posted in Illustration
Tagged end point, equivalence point, spectrophotometric titration, titration curve, titrimetry
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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
Posted in Illustration, Photo
Tagged complexation titration, EDTA, end point, indicator, titrimetry
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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
Posted in Illustration, Photo
Tagged acid-base indicator, acid-base titration, end point, equivalence point, indicator, titrimetry
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Strong Acid–Strong Base Titration Curve
Typical acid–base titration curve showing how the titrand’s pH changes with the addition of titrant. The titrand is a 25.0 mL solution of 0.100 M HCl and the titrant is 0.100 M NaOH. The titration curve is the solid blue … Continue reading