Titrations in Analytical Chemistry

AgCl occurs near the equivalence point in Volhard method.

The first drop of excess Ag+1 will react with Bromine (Br-1) indicator in the Volhard method.

Mohr method is used for the determination of Iodine (I-1).

The pH of Mohr method must be between 6.5 and 9.

Volhard method is rarely used nowadays.

AgBr and AgI ppt. in Volhard method require filtration process before undertaking back titration.

In titration methods, the reagent of known concentration is used to react partially with the analyte.

Back-titration is a process used when the rate of reaction between the analyte and reagent is fast.

The volumetric titration is also known as indirect titration.

The equivalence point in a titration is when the amount of standard reagent added is equal to the analyte.

Analyte is a solution of known concentration but unknown volume.

End point in a titration refers to a point where only a chemical change occurs.

In titration, the indicator is added to the analyte solution to produce an observable physical change at the equivalence point.

Primary standard solutions are less stable than secondary standard solutions.

Weak acids and bases are commonly used as standard reagents in acid-base titrations.

In acid-base titrations, the acid-base indicator is usually a strong organic acid.

Complexometric titration is based on the reaction between a metal ion and a ligand to form a complex.

EDTA is a primary standard used as a complexometric titrant.

Metal ion indicators should bind more strongly with metal ions than the complexing agent does.

Precipitation titration is based on the formation of highly soluble precipitates.

The Mohr Method uses adsorption indicators for detecting the end point.

The Fajans Method utilizes a red precipitate of Ag2CrO4 as an indicator.