How is filter paper used to separate a precipitate from a liquid in a laboratory?

In a laboratory setting, filter paper is used to separate a precipitate from a liquid by acting as a porous medium that traps solid particles while allowing the liquid to pass through.1

To perform this separation, the mixture is poured onto a piece of filter paper that rests inside a funnel. The filter paper is chosen based on its pore size to ensure it effectively captures the specific precipitate being handled. As the mixture passes through, the solid precipitate is retained on the paper, while the clear liquid—often referred to as the filtrate—is collected in a vessel below.1

If the filtration process is slow due to the small pore size of the paper, the rate can be increased by using a partial vacuum in the receiving flask. While standard conical glass funnels lined with folded or fluted filter paper are common, other setups like the porcelain Büchner funnel may be used when vacuum filtration is required. The quantitative transfer of the precipitate to the filter is a critical skill in laboratory analysis.123