If the solid dissolves in methanol, ethanol, acetone or acetic acid at room
temperature, add a few drops of water to the solution to see if the solid precipitates. If it
does, heat the mixture in the water bath and observe if the solid re-dissolves. Adjust the
composition by adding drops of solvent and/or water as necessary until the solid has just
dissolved and the solution is saturated at the boiling point. Allow the solution to cool to
room temperature, then stick the test tube in ice. Describe the shape of the crystals which
form. Do not add water to either toluene or ligroin since it is not miscible with these
solvents.