1) what potential impurities were removed during recrystallzation?
2) two solids with different identities are frequently mixed together & do not melt, why do you suppose that the solids actually melted?
1. It would help if we knew what you were recrystallizing.
2. This question makes no sense at all. First they don't melt then they do.
1)what potential impurities were removed during solventless aldol recrystallzation?
2) why do you assume that is already melted even if they didn't.?
1) To determine the potential impurities that were removed during recrystallization, you would need to have information about the original substance and the solvent used for recrystallization. Here's a general procedure to identify potential impurities during recrystallization:
a) Start by identifying the original substance and its known impurities, if any.
b) Determine the solvent that was used for recrystallization.
c) Research the solubility of the original substance and its impurities in the chosen solvent. Pay attention to their solubility at different temperatures.
d) Based on their solubilities, consider which impurities are likely to have been removed during the recrystallization process. Generally, impurities with lower solubilities in the solvent at the recrystallization temperature are more likely to be removed.
2) When two solids with different identities are mixed together but do not melt, there could be a few possible explanations:
a) The solids may have formed a eutectic mixture: Some combinations of solids can form a eutectic mixture, which is a mixture with a lower melting point than the melting points of the individual components. This can result in the solids appearing to melt together.
b) The solids may be forming a solid solution: Solid solutions are formed when two or more components mix together on a molecular level while remaining in the solid state. In this case, the mixture may not exhibit a clear melting point as it remains solid even when heated.
c) The solids may undergo decomposition or sublimation: It is also possible that one or both of the solids could be decomposing or sublimating instead of melting. Decomposition involves a chemical change, while sublimation is the direct transition from a solid to a gaseous state without passing through the liquid phase.
To determine the cause of the observed behavior, it would be important to investigate the physical and chemical properties of the solids and consider factors such as their composition, structure, and melting points. Additionally, further testing and analysis, such as differential scanning calorimetry (DSC) or infrared spectroscopy (IR), may be required to gain a better understanding of the phenomenon.