More efficient methods include vacuum drying or placing in a desiccator. If a portion of the solid does not seem to dissolve, even after more hot solvent has been added, it is likely due to the presence of very insoluble impurities.
Wooden sticks are placed into the solution and the solution is allowed to cool and evaporate slowly. To perform a hot filtration, fold a piece of filter paper into a fluted cone shape and place it into a glass stemless funnel.
These crystals can be used for X-ray analysis, which is the ultimate authority in determining the structure and three-dimensional shape of a molecule. Heat the beaker and keep adding solvent until the solute is completely dissolved.
This crystal-like naphthalene-methanol solution was a fluorescent pink. The purity was confirmed due to the nearly identical melting points of the recrystallized naphthalene Pour the solution through the paper.
Acetaminophen is considered an alternate to aspirin since it does not irritate the stomach Richman,