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Results tagged with purification
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user 41328
For questions about purification - the process of rendering something pure, clean of foreign or undesired elements. Not to be confused with [metallurgy] or [chromatography].
3
votes
Why is the solid product washed with ice-cold solvent during in the last stages of recrystal...
Possible sources of impurities in the recrystallization process can be described in terms of phenomena occuring during coprecipitation and which are the basis of gravimetry:
inclusion (impurity occu …
- 38.5k
5
votes
Accepted
Synthesis of anhydrous sodium tungstate
Hoermann [1] prepared anhydrous sodium tungstate by melting the 1:1 mix of sodium carbonate and tungsten(VI) oxide (and, subsequently, growing single crystals); alternatively, he proposed prolonged dr …
- 38.5k
7
votes
Recrystallisation of dibenzylideneacetone
Armarego's Purification of Laboratory Chemicals suggests using dichlormethane–hexane pair instead of ethanol–water; it also lists crystallization from warm ethyl acetate, ethanol or petroleum ether as … Purification of Laboratory Chemicals; Elsevier: Boston, MA, 2017. ISBN 978-0-12-805457-4. …
- 38.5k
4
votes
Accepted
Crystallization in a solution of 2 or more solutes
When the solution contains several substances, it is very often possible to achieve their separate sequential crystallization due to the different nature of the solubility of the substances as a funct …
- 38.5k