Question
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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Summary
| 2023 BHSU @ Berkeley | 03/18/2023 | Y | 3 | 13.33 | 100% | 33% | 0% |
| 2023 BHSU @ Maryland | 03/11/2023 | Y | 3 | 20.00 | 67% | 67% | 67% |
| 2023 BHSU @ Northwestern | 02/25/2023 | Y | 6 | 21.67 | 100% | 67% | 50% |
| 2023 BHSU Online | 04/15/2023 | Y | 4 | 15.00 | 75% | 50% | 25% |
| 2023 BHSU @ Sheffield | 04/15/2023 | Y | 2 | 15.00 | 100% | 50% | 0% |
| 2023 BHSU @ Waterloo | 04/15/2023 | Y | 3 | 10.00 | 100% | 0% | 0% |
| 2023 BHSU @ Yale | 04/08/2023 | Y | 3 | 16.67 | 100% | 33% | 33% |
Data
| Berkeley B | [Insert Lawyer Joke Here] | 0 | 10 | 0 | 10 |
| Berkeley A | It's Joever | 0 | 10 | 0 | 10 |
| Stanford A | Stanford B | 0 | 10 | 10 | 20 |