Freeze-pump-thaw cycles can be used to perform this process for small volumes. For 10 points each:
[10h] Name or describe this general process, which is performed using bubbles of a chemically inert substance, such as helium, in sparging.
ANSWER: degassing a solution [accept answers describing the removal of gas or oxygen or air from a solution ]
[10e] The “pump” step of a freeze-pump-thaw cycle involves this condition, which is used along with a Büchner funnel in a filtration technique. The “ultra-high” regime of this condition is defined as a pressure below 100 nanopascals.
ANSWER: vacuum [accept ultra-high vacuum]
[10m] A series of ports with specialized stopcocks are connected to a vacuum pump and a source of inert gas in these systems for manipulating air-sensitive compounds. They're named for a German chemist.
ANSWER: Schlenk lines [accept vacuum gas manifolds]
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