OCHEM1 LABS

Lab 8: OCHEM 1 | Questions and Answers| Exam Review The principle site of reactivity in alkenes is the **** carbon-carbon double bond -the electrons in the pi orbital of the alkene are exposed to attacking reagents The pi bond is relatively... **** weak, and more polarizable compared to the sigma bonds.

Lab 7: OCHEM 1 | Questions and Answers| Well reviewed The dehydration of alcohol produces **** an alkene by functional group transformation Cyclohexanol is converted into an alkene by elimination of... **** water

Lab 6: OCHEM 1 |Reviewed Questions and Answers In this experiment, what are we isolating? **** (S) - 1 phenylethylamine How are we going to isolate it? **** Racemic (1) phenylethylamine will be reacted with enatiomerically pure (2R,3R) tartaric acid to form diastereoisomeric salts which can be resolved by selective crystallation from methanol

Lab 5: OCHEM 1 | QUE & ANSW Liquid-Liquid extraction **** mixtures that contain different solubility properties that are separated by the "partitioning" of 2 immiscible phases -typically H20 and an organic solvent. Can mixtures with similar solubility properties be separated? ****

Lab 4: OCHEM1 Distillation **** the process of separating the component substances from a liquid mixture by selective evaporation and condensation -usually miscible liquids Simple distillation ****

Lab 3: OCHEM 1 Recrystallization **** process of purifying an impure crystalline solid via heating in a suitable solvent, followed by cooling to allow the solid to reform in such a way that the impurities are excluded from the purified solid. Gravity Filtration

Lab 2: OCHEM 1 Melting point of a solid compound **** temperature at which a phase transition from solid to liquid occurs Melting point of a pure crystalline compound ****

Lab 1: OCHEM | Exam Review | Que & Answ Chromatography *** defined as a method for the separation of a mixture into its components by distribution between a mobile phase and a stationary phase. In TLC (thin layer chromatography), the stationary phase is generally a finely divided... *** solid (typically silica gel or alumina) The mobile phase is generally a... *** liquid The mixture that scientists want to separate is first applied to the