Organic Chemistry Lab

Organic alchemy Laboratory Report. Experiment 1 Crystallization. Objectives 1. To study the crystallization process. 2. To identify the beat out suitable solvent to use for the crystallization process. 3. Gain an experience in purifying an organic compound by the proficiencys of the crystallization. Introduction. Crystallization is a technique which pill rollers use to purify solid compounds. It is one of the fundamental procedures each chemist must master to become proficient in the laboratory. Organic compounds disjointed from their natural sources or prepargond synthetically in the laboratory ar usually impure.The impurities big businessman be compounds with properties similar to those of the desired compounds, reaction-starting materials, products of side reactions, or simple dust or soil. Pure substances are not and important to chemists in their studies of matter but also are rattling in other areas of study such as medicine where those substances might be used as medi cations Crystallization is based on the principles of solvability compounds (solutes) tend to be more water-soluble in hot liquids (solvents) than they are in cold liquids.If a saturated hot solution is allowed to cool, the solute is no longer soluble in the solvent and forms crystals of pure compound. Impurities are excluded from the suppuration crystals and the pure solid crystals can be separated from the dissolved impurities by filtration. Chemical requirement. Solvent Distilled water, Ethanol, and Acetone. Solute phenylacetamide. Result Data and Report Sheet. 1. 1 Choosing a suitable solvent.Solvents solubility Appearances and quantity of the crystal at room temperature inhabit temperature Hot temperature Distilled water insoluble soluble Crystal resembling washrag needle Ethanol best - No crystal Acetone good - No crystal Why do you choose this solvent? It is because Acetanilide is more soluble in hot water but not in old water, also sugar is impurity it is very solu ble in cold water therefore, it fits the essential characteristics needed for the suitable solvent. . 2 Crystallization Appearance of phenylacetamide sample (before crystallization) white dust. Mass of acetanilide sample (before crystallization) 2. 15g. Appearance of acetanilide crystal jelly white like white needle. Mass of filter typography 1. 42g Mass of filter paper +acetanilide crystal Mass of acetanilide crystal Calculation. % yield of crystal =