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A filtering funnel is a laboratory tool that is used to separate solids from liquids through filtration. They are typically made of glass or plastic and come in various sizes. They are cylindrical in shape and have a wide top and a narrow stem. The top of the funnel is used to hold filter paper, which acts as a barrier to trap the solid particles while allowing the liquid to pass through.
They are often used in conjunction with a filter flask, which is connected to a vacuum pump to create a suction that pulls the liquid through the filter paper.
The filtered liquid is collected in the flask while the solid particles are trapped in the filter paper. They can be used for many different types of filtration, such as liquid-solid, liquid-liquid, and gas-liquid. They are easy to clean and can be used multiple times.