Gravimetric Analysis

Gravimetric Methods of Analysis

Methods based on the measurement of mass, including precipitation methods and volatilization methods.

Precipitation

Method where the analyte is converted to a sparingly soluble precipitate, filtered, washed, and weighed to determine composition.

Volatilization

Method where the analyte or its decomposition products are volatilized at a suitable temperature and collected for weighing.

Properties Of Precipitates And Precipitating Reagents

Characteristics of an ideal precipitating agent including specific reactivity, ease of filtration, low solubility, and known composition after treatment.

Particle Size and Filterability of Precipitates

Factors influencing particle size such as solubility, temperature, reactant concentrations, and methods to control particle size.

Colloidal Precipitates

Process of coagulation, adsorption, absorption, and charge determination in colloidal particles formed during gravimetric analysis.

Coprecipitation

Process where normally soluble compounds are carried out of solution by a precipitate, including surface adsorption, mixed-crystal formation, occlusion, and mechanical entrapment.

Precipitation from Homogeneous Solution

Formation of precipitates by slow generation of a precipitating reagent homogeneously throughout a solution, leading to better-suited precipitates for analysis.

Gravimetric Analysis

A method of quantitative chemical analysis used to determine the amount of a substance by measuring its mass.

Ignition

The process of heating a substance to a high temperature, often to decompose it or to remove impurities.

Thermogravimetry

The process of recording thermal decomposition curves to analyze changes in mass with temperature.

Thermogram

A graph showing the relationship between mass and temperature in thermogravimetric analysis.

Hydrous Oxide

A compound containing water molecules in its chemical structure.

Chelating Reagent

A compound that forms a complex with a metal ion by forming multiple coordination bonds.

Volatilization

The process of converting a solid or liquid into a gas by heating.