The discussion revolves around the suitability of ethanol as a solvent for the recrystallization of phthalic acid, focusing on solubility characteristics and the miscibility of solvents. Participants explore the criteria for selecting appropriate solvents in recrystallization processes.
There is disagreement regarding the miscibility of water and ethanol, with some participants asserting they are not miscible while others claim they are. The discussion remains unresolved regarding the overall suitability of ethanol for recrystallization of phthalic acid.
Participants express uncertainty about the solubility criteria for recrystallization and the implications of solvent miscibility. There are also references to the reactivity of solvents with the compounds being recrystallized, which may affect their suitability.
Students studying organic chemistry, particularly those learning about recrystallization techniques and solvent properties.
Say what?CMATT said:I also know water and ethanol are not miscible.
Sorry my chemistry book is confusing! I misreadBystander said:Say what?
alchemistf9 said:Water and ethanol are miscible!
Phthalic acid must be highly soluble in ethanol but not in water at room temp and therefore is a bad solvent for recrystallization. In order to have properly recrystallization the compound must be insoluble or only partially soluble in the solvent at room temperature but highly soluble in the solvent at or near its boiling point.
A solvent should also not react with the compounds ...CMATT said:Homework Statement
Why is ethanol a bad choice for recrystallization of phthalic acid?
2. The attempt at a solution
I know phthalic acid is very soluble in water, so water is a great candidate to recrystallize phthalic acid. I also know water and ethanol are not miscible. But I don't know how to properly answer this question. Please help.