Click here to see how to fold filter paper.
|Step 1:|| Fold filter paper as
shown above. This fluted paper offers a large surface area for efficient
Place folded filter paper in wide stemmed funnel. (Use of a wide stem is particularly desirable when doing hot gravity filtrations, since a narrow stem will often plug up with precipitated solids.)
Pour slowly enough to ensure that liquid will not overflow filter.
REMINDER: Gravity filtration is normally used to remove unwanted solids from a desired solution. (In contrast, to collect a solid product, the usual choice is vacuum filtration). In both processes the solution passing through the filter is called the "filtrate."
| Rinse out flask with one or two portions of fresh solvent to wash the desired (soluble) materials from the solid.|
©2001,2002 Daniel A. Straus
|The wash portion(s) is then poured through the filter and combined directly with the filtrate.|
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