What happens if too much solvent is used to initially dissolve a solid during re
ID: 888101 • Letter: W
Question
What happens if too much solvent is used to initially dissolve a solid during recrystallization? Why? How can you reduce The solubility of a nonpolar compound in a solvent such as toluene or cyclohexane? How can you increase The solubility of a polar compound in a nonpolar solvent such as toluene cyclohexane or petroleum ether? Are covalent bonds or intermolecular nonbonding interactions broken when an organic compound is dissolved? When this solid is dissolved, is there a phase change from solid to liquid that accompanies The change in bonding or nonbonding interactions?Explanation / Answer
1)
if we use a more solvent during a recrystallization. our desired product will stay dissolved in solution.
This means that our percent recovery will be lower than it should be.
2)
we can reduce the solubility of non polar compound in non polar solvent
by following conditions
(i) change in the temperature (increases),
(ii) on addition of another solute
(ii)reduce the volume of the solvent
3)
in this case one thing we can do is increase the temperature.
no more factors affects the solubility of polar compound in non polar solvent
4)
intermolecular bonds broken when organic compound dissolve. non- bonding inter molecular forces like dispesion or vanderwall forces are broken between the molecules when organic solid converts in liquid
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