Sample is a solution of unknown concentration. Standard is a solution of exactly known concentration.
Requirements of titrimetric reactions:
- The reaction must be simple and expressed by a chemical equation.
- A single reaction must occur between the sample and titrant.
- The reaction must be instantaneous (rapid).
- Suitable standard solution must be available.
- The end point should be easily detected.
Types of quantitative reactions:
- Neutralization reactions.
- H2O formation.
- Displacement: Formation of weak acid or weak base.
- Complexometric reactions.
- Redox reactions (Electron transfer).
- Preciptimetric reactions.
