Question

This process occurs as I increases in Cohn’s equation. Ethanol and sodium acetate are added to induce this process, which is followed by a 70% ethanol wash, in a method to concentrate DNA. This process occurs in a “hanging drop” or “sitting drop” in vapor diffusion. Ions high in the Hofmeister series are more kosmotropic and better at inducing this process. It’s not denaturation, but this process can be induced for proteins by adjusting (15[1])the pH to the (*) isoelectric point or by adding ammonium sulfate. This process is performed by seeding a supersaturated protein solution to prepare samples for XRD. Adding salt to a silver chloride solution causes AgCl to undergo this process due to the common ion effect. For 10 points, name this process in which an insoluble compound settles as a solid out of solution. ■END■

ANSWER: precipitation [or crystallization; accept ethanol precipitation; accept salting out until “salt” is read; accept protein precipitation or DNA precipitation; accept answers indicating making crystals]
<VD, Chemistry>
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Andrew WangIllinois BlueChicago A7315

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2024 ARCADIA at Waterloo2024-11-09Y1100%100%0%51.00
2024 ARCADIA at Illinois2024-11-09Y1100%100%0%73.00
2024 ARCADIA at UC Berkeley2024-12-06Y2100%50%50%84.00