filter paper
Noun: A porous, unsized paper designed specifically for the process of filtration. It allows liquids to pass through while retaining solid particles.
Filter paper is a laboratory material used primarily in chemistry and biology for separating solids from liquids. - It is placed in a funnel. - A mixture is poured onto it. - The liquid (filtrate) passes through the paper's pores. - The solid residue is left on the paper.
Basic Usage:
- We need some filter paper to separate the precipitate from the solution.
- After the experiment, the used filter paper contained all the solid impurities.
Contextual Usage:
- The quality of the filter paper affects the speed and clarity of the filtration.
- Always fold the filter paper correctly to fit the funnel and maximize the surface area.
Qualitative vs. Quantitative Filter Paper: Qualitative paper is used for general separations, while quantitative paper is ashless and used for gravimetric analysis where the residue is weighed.
- For precise measurement of the precipitate, you must use quantitative filter paper.
Pore Size/Grade: Filter paper is often classified by pore size (e.g., fast, medium, slow flow) which determines the size of particles it can retain.
- Choose a slow-grade filter paper to capture very fine particles.
- Filter (verb/noun): The general process or device for separation.
- Filtration (noun): The process of using a filter.
- Filtrate (noun): The liquid that has passed through the filter paper.
- Buchner funnel: A funnel used with a vacuum and a circle of filter paper for faster filtration.
- Filter funnel: A funnel designed to hold filter paper.
- Filtering medium (a more general term)
- Laboratory paper (in a specific context, though less precise)
- Filter paper disc: A pre-cut circular piece of filter paper.
- Place a filter paper disc in the Buchner funnel before applying vacuum.
- Ashless filter paper: A type of quantitative filter paper that leaves minimal residue when ignited.
- Fluted filter paper: Filter paper folded with pleats to increase the flow rate during filtration.
-
a porous unsized paper used for filtering
