degassing a solution - 2023 BHSU

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
Glass Onyen: A Knives Out Mystery	Fan-tastic Negs and Where to Find Them	10	10	10	30
Maryland A	Rutgers Diaspora	0	0	0	0
The Perfection of Wisdom in 8,000 Negs	Maryland B+	10	10	10	30
Northwestern	Purdue	10	10	10	30
Chicago A	WUSTL	10	10	10	30
Chicago B	Maryland B-	0	10	10	20
Amartya Senpai Notice Me	Epic Games	10	10	10	30
Illinois A+	Michigan	0	10	0	10
Mojo Shojo	OSU	0	10	0	10
Hutto Hippos	Rollin in from Sturgis, The Cheyne Gang	0	10	10	20
Hutto Hippos	Rollin in from Sturgis, The Cheyne Gang	0	10	10	20
Hutto Hippos	Cornell C++	0	10	10	20
Hutto Hippos	Cornell C++	0	10	10	20
Broken Imperial Nomads	Oxford Hornets	0	10	10	20
Magisters Ludi	Buzzers Karamazov	0	10	0	10
The Enrique Trastamara Military Academy B	Cornell B-	0	10	0	10
Rollin in from Sturgis, The Cheyne Gang	What is BH! And you are asking me? BHSU	10	10	0	20
The Passion According to C.H.	Cameron et al.	0	10	0	10
The Vulture's Guide to Buzz	Neg 5! Playing Quizbowl, Liddy Style	0	10	0	10
Milan et al.	Parth et al.	0	10	0	10
Hutto Hippos	Rollin in from Sturgis, The Cheyne Gang	0	0	10	10
Hutto Hippos	Rollin in from Sturgis, The Cheyne Gang	0	0	10	10
meet the new weird, same as the old weird	Columbia B	10	10	0	20
UG Championship Players (and Mazin)	nats is supposed to mean you all have gone soft	0	10	10	20
Olmo (Bonus) Bagelry	Watching Arthur Delot-Vilain at Chicago Open Made Me Like French People Again	0	10	0	10
Hutto Hippos	Cornell C++	0	0	10	10
Hutto Hippos	Cornell C++	0	0	10	10