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- Melting point of impure sulfanilamide: 164 C — 167 C - Melting point of pure sulfanilamide: 173 C — 175 C The difference in the melting points...

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I need to write a conclusion for this lab, and I was wondering what else could I include in my conclusion?

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- Melting point of impure sulfanilamide: 164 C — 167 C
- Melting point of pure sulfanilamide: 173 C — 175 C The difference in the melting points was expected. The melting point of impure
sulfanilamide is expected to be lower because impure substances in a crystal solid disrupt the repeating pattern of forces (lattice) that hole the solid together.
Therefore, a smaller amount of energy is required to melt the part of the solid surrounding the impurity. The melting point is somewhat similar to the literature
value of 163 C — 164 C. Based on the melting point, the pure sulfanilamide is, in fact, pure. The pure crystals looked nothing like the impure white powder. They were
clear, shiny, white crystals. Several sources of loss could be:
- Too much solvent was added in the recrystallization
- If the solid were dissolved below the boiling point of the solution, too much solvent would be needed for it to dissolve. - Too much rinse solvent or rinse solvent that is not chilled to ice temperature
was used and some of the product was re-dissolved and lost.

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