One technique often performed in this state uses a Buchner funnel to extract a dissolved solid from a solvent.
One technique often performed in this state uses a Buchner funnel to extract a dissolved solid from a solvent. Another technique performed in this state uses a spin bar instead of boiling chips, because that variant does not need to heat the liquid. Water-traps and water aspirators are occasionally used in both the aforementioned namesake filtration and distillation techniques. Experiments carried out in this state usually require Pyrex or round-bottomed glassware because Erlenmeyer flasks or those with (*) cracks may spontaneously collapse. The two walls of a Dewar flask are separated by material in this state, which is often achieved by means of a pump. For 10 points, name this state in which a near-complete lack of vapors leads to extremely low pressure.
One technique often performed in this state uses a Buchner funnel to extract a dissolved solid from a solvent.
vacuum [or more specific answers such as high vacuum or ultra high vacuum; accept vacuum filtration until read; accept vacuum distillation until read; prompt on "low pressure"]