Purifying and Heating Precipitates for Weighing

After filtration, a precipitate is washed to remove coprecipitated impurities and any leftover mother liquor. A mother liquor is the liquid that remains after the solid forms. Washing helps make the final solid cleaner before it is measured.

The wash solution depends on the type of precipitate. C...

Following filtration, the precipitate is washed to remove coprecipitated impurities and any remaining mother liquor.

Colloidal precipitates, such as silver chloride, are washed with an electrolyte to prevent peptization.

In the case of slightly soluble precipitates, such as lead sulfate, the wash solution contains a common ion to r...