232 Acetanilide power point

232 Acetanilide power point - Organic Chemistry I - Lab...

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Unformatted text preview: Organic Chemistry I - Lab Organic Chemistry I - Lab Lab #1 - Recrystallization of Acetanilide Recrystallization is a purification technique in which a crude solid is dissolved in a minimum volume of hot solvent; upon cooling purer solid precipitates from solution. Recrystallization Recrystallization Factors influencing solubility : 1. solvent properties- solute/solvent interactions like dissolves like (polarity) polar H 2 O dissolves most (polar) inorganic compounds nonpolar organic solvents dissolve most (nonpolar) organics 2. solvent volume- amount of solute vs. volume of solvent 3. solvent temperature- solubility increases with temperature {stirring will increase the rate of dissolving, but not the degree of solubility} Recrystallization Solvents Recrystallization Solvents Polarity Index Common Name of Solvent Structure 0.0 hexane CH 3 (CH 2 ) 4 CH 3 (least polar) 1.7 carbon tetrachloride CCl 4 2.3 toluene C 6 H 5 CH 3 2.9 diethyl ether (CH 3 CH 2 ) 2 O 3.0 benzene C 6 H 6 3.43....
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232 Acetanilide power point - Organic Chemistry I - Lab...

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