Lab Report 4

Lab Report 4 - Recrystallization and Melting Points...

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Recrystallization and Melting Points Recrystallization of an Unknown Solid and the Decolorization of Brown Sugar The ideal solvent will not dissolve the solid at room temperature. It should dissolve the solid at its boliling point, but the solid should not react or decompose. It should recrystallize with cooling, either at room or ice temperatures, and it should be completely soluble so it remains in the solution or completely insoluble. The crystal does not dissolve in acetone at room temperature but does at boiling temperatures. It does not recrystallize at any point in cooling. The crystal never dissolves in heptane. In water and in ethanol, however, the crystal does not dissolve at room temperatures, does dissolve at boiling temperatures and recrystallizes in an ice bath. The group decided on water because more crystals were recovered and stayed intact with water and they were more easily extracted. After recrystallization, the substance was washed, dried and crushed for melting
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This note was uploaded on 03/17/2009 for the course CHEM 3A taught by Professor Fretchet during the Spring '08 term at Berkeley.

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Lab Report 4 - Recrystallization and Melting Points...

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