Buchner Funnels
The Buchner funnel (pronounced "byook-ner") is the white porcelein funnel in your lab drawer. You need a grey or black rubber adaptor to connect it to a side-arm flask. The Buchner is used exclusively for vacuum filtrations. The adaptor forms a snug seal so that when reduced pressure is applied to the vacuum flask, liquid poured into the Buchner is sucked into the flask quickly.
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