Question
Historian John Livengood argued against the prevailing wisdom that Richard Willstätter prevented the widespread adoption of this technique until the 1930s. For 10 points each:
[10e] Name this technique invented by Mikhail Tsvet, in which the mobile phase separates into components as it passes through a stationary phase.
ANSWER: chromatography [accept column chromatography] ("Tsvet" is the Russian word for "color," which is sometimes cited as an example of nominative determinism.)
[10h] Livengood cites a debate between Tsvet and Leon Marchlewski to argue that chromatography was initially unpopular because it didn't employ this then-ubiquitous process, whose products are separated from the mother liquor.
ANSWER: crystallization [or recrystallization; or recrystallizing]
[10m] Tsvet developed chromatography to extract this biomolecule whose porphyrin ("POR-fur-in") ring contains a central magnesium atom.
ANSWER: chlorophyll [accept chlorophyll a or chlorophyll b]
<Science - Chemistry>
Data
Summary
| Tournament | Edition | Exact Match? | Heard | PPB | Easy % | Medium % | Hard % |
|---|---|---|---|---|---|---|---|
| 2025 PACE NSC | 06/07/2025 | Y | 36 | 13.61 | 78% | 56% | 3% |