Why might the melting point of the crystals obtained in this experiment be close

Question

Why might the melting point of the crystals obtained in this experiment be close to but below one of the reference melting points and melt slowly over several degrees? Would you expect the melting point of the recrystallized crystals to be higher than lower tan or the same as first crystals? Why? A reference book mentions that naphthalene can be recrystallized from ethyl A student to some and dissolves it in 100 mL ethyl alcohol. After slowly cooling room temperature and letting the solution sit for a long time, no crystals appeared. Letting a small amount of surface solvent evaporate, then swirling and scratching the flask with a glass rod, did not initiate crystallization. List two other things that could be done to try to obtain crystals from this solution Throwing out the solution and starting over is not an option.)

Explanation / Answer

List of two other things that could be done to try to obtain crystals are...

1. the solution should be cooled in an ice bath. decreases in temperature using an ice bath should only be used until crystals begin to form and if it appear then the solution should be allowed to warm to room temperature for formation of crystal slowly.

2. seed crystal of napthalene should be added to the solution.

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