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Cards In This Set
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What was our objective in the Recrystallization of Impure Solids Lab?
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To obserce the formation of crystalline solids from solution. the seperation and purification of mictrures of organic compounds in two physical states
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The solids that were used for the recrystallization lab was?
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Benzoic acid, Acetanilide, and Napthalene
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What is a pure compound?
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A homogenous sample consisting opnly of molecules having the same structure. however, somtimes can contain contaminants....
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Other techniques for purifying solids are...?
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Sublimation, extraction, and chromatography
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What is the whole point in recrystalizing?
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Dissolving the solids in an appropiate solvent allows the crystals to reform on cooling, and impurities remain in solution.
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Almost all solids are more soluble in ______ than in ______ solvents
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Hot, cold
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Upper extreme is determined by ___________of a solvent while, the lower limit is by ____________
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Boiling point, experminetal convenience
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What are the steps required for recrystallization?
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Selection, Dissolution, Decoloration, Formation, Isolation, and Drying
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Dicholormethane vs, acetone
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Dichloromethane is nonpolar, acetone is polar
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A unknown can be determined by its physical description for example?
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Melting points, bp, index of refraction, density, specific rotation and solubility
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