Gravimetry: Choosing Selective Precipitants

Gravimetry uses selective precipitants to form a pure solid that can be filtered and weighed. The choice of precipitant matters because the solid must be easy to collect and suitable for measurement.

Common inorganic precipitants can be used to determine several cations and anions. In some cases,...

Common inorganic precipitants yield insoluble precipitates that can be used to quantify several cations and anions.

The formation of precipitates such as barium chromate can be applied to determine the cation as well as the anion.

Some precipitates, such as hydrous oxides, oxalates, and phosphates, are first converted to a weighabl...