CHEM 0310 Lecture Notes - Organic Chemistry, Chemical Polarity, Temperature Coefficient
Document Summary
The recrystallization and melting point of benzoic acid. The mass of pure benzoic acid crystals obtained is 2. 83 g and the percent recovery of pure benzoic acid in the 6. 25 g crude benzoic solution is 45. 28%. The melting point range of the slow run of crude benzoic acid is 110 c - 118 c and the melting point range of the slow run of pure benzoic acid is. Recrystallization involves the dissolution of a solid in a heated solvent and the reformation of crystals as a solution cools, allowing the impurities, which do not fit into the crystal lattice, to remain in solution. This technique is an important organic chemistry because it is one of the most common methods for purification of solid compounds, allowing one to achieve one of the highest states of purity. This procedure relies on the fact that solubility increases as temperature increases.
