Friday, September 20, 2019

experimental chemistry - What is the correct name for this lab technique in crystallization?



Take a glass rod and rub vigorously the wall of the flask, the substance will crystallize out of the solution.


Take a fire polished stirring rod and etch (scratch) the glass of your beaker. The small pieces of glass that are etched off of the beaker serve as nuclei for crystal formation


But reaching back to my halcyon years of organic synthesis and crystallization, recalling vivid memories of scratching the sides of Erlenmeyer flasks with a glass rod to induce crystallization


It's a common lab technique. But does it have a name?




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