Name: Filtration
Uploaded: 2024-04-04T10:51:23
Description: Learn by watching this video about Filtration at JoVE.com

Filtration is the physical separation of solids from a fluid using a filtration medium.
The filtration medium is chosen depending on the purpose of filtration, quantity, and particle size of the solid.
In general, filtration efficiency increases with particle size.
In simple filtration, the precipitate is first allowed to settle, and the mother liquor is decanted down a glass rod into a funnel fitted with filter paper.
The precipitate is then transferred to the filter paper using a rubber policeman.
Ashless filter paper can be ignited to recover the precipitate, when weighing is required.
Alternatively, a sintered-glass funnel fixed to a Buchner flask, which has a sidearm that can be connected to a vacuum pump, is used to trap the precipitate.

filtration

Filtration is a physical separation process that involves passing a suspension through a porous medium to separate solids from fluids. During filtration, solids collect on the porous medium while liquids, also collectively known as the filtrate, pass through. The filtration medium is selected based on the filtration purpose, quantity, and nature of the precipitate. The general criteria for a suitable filtering medium are that it is inert, mechanically strong, nonabsorbent toward dissolved materials and permissive toward rapid filtration.
The simplest filtration apparatus consists of filter paper fitted in a long-stemmed funnel sitting above a beaker. The solution to be filtered is poured down a glass rod onto the filter paper. The filtrate is collected in the beaker, and the solid is retained on the filter paper. Any solid that adheres to the glass rod or the beaker with the original solution is dislodged using a rubber policeman. Because filter paper is hygroscopic, ashless or low-ash filter paper is preferred when weighing is required. Ashless filter paper is also employed in gravimetric procedures that involve igniting the solids before weighing.
Alternatively, the solid can be collected in glass or silica crucibles containing a porous glass disc. The solid is transferred to the crucible fitted into a Buchner flask, and filtration is performed under suction. After filtration, the crucible is dried and weighed directly. The weight difference of the crucible before and after filtration gives the mass of the collected solid.

Learn by watching this video about Filtration at JoVE.com

Filtration

Filtration is the physical separation of solids from a fluid using a filtration medium.
The filtration medium is chosen depending on the purpose of ...