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An evaporating dish is a piece of laboratory glassware used for the evaporation of solutions and supernatant liquids, [a] and sometimes to their melting point.Evaporating dishes are used to evaporate excess solvents – most commonly water – to produce a concentrated solution or a solid precipitate of the dissolved substance.
Evaporation is an essential part of the water cycle. The sun (solar energy) drives evaporation of water from oceans, lakes, moisture in the soil, and other sources of water. In hydrology, evaporation and transpiration (which involves evaporation within plant stomata) are collectively termed evapotranspiration. Evaporation of water occurs when ...
Glass evaporating dishes, such as watch glasses, are primarily used as an evaporating surface (though they may be used to cover a beaker.) The Petri dish is a flat dish filled with a nutritious gelatin that allows for microorganisms to quickly grow, its named after its inventor Julius Petri in the 1880s.
Evaporating flasks (for rotary evaporator) centered, pear shaped, with socket or with flange. Powder flasks, for drying of powdered substances, pear shaped, with socket; Retorts are simplified distillation apparatuses, with long, down turned necks, and round bases. They have largely been replaced by condensers.
Corning manufactures Vycor products for high-temperature applications, such as evaporating dishes. [citation needed] Porous vycor is a prototypical matrix material for the study of confined liquid physics. [citation needed] Vycor can also be used for removal of 231 Pa and 233 Pa in fuel recycling. [5]
When used to cover beakers, the purpose is generally to prevent dust or other particles from entering the beaker; the watch glass does not completely seal the beaker, so gas exchanges still occur. When used as an evaporation surface, a watch glass allows closer observation of precipitates or crystallization. It can be placed on a surface of ...
Evaporating dish; H. Hessian crucible; M. Mortar and pestle This page was last edited on 26 November 2016, at 23:11 (UTC). Text is available under the Creative ...
Unlike wire gauze, which primarily supports glassware such as beakers, flasks, or evaporating dishes and provides indirect heat transfer to the glassware, the pipeclay triangle normally supports a crucible and allows the flame to heat the crucible directly. The triangular shape allows rounded crucibles of various sizes to rest in a stable way.