Lab Report 2 final.docx - SOLUBILITY AS A PHYSICAL PROPERTY...

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SOLUBILITY AS A PHYSICAL PROPERTY Myrabelle B. Lopez CHEM 31.1- BC ABSTRACT Organic chemistry encompasses almost all fields of chemistry due to its wide range of theories which are mainly focused on carbon that is found in all living organisms. One of the physical properties being studied under this discipline is the solubility which is a measure of how much solute will dissolve in a given amount of solvent at a specific temperature. This experiment aim to observe and describe the dissolution process, establish that solubility is a physical property which is dependent on some factors like the nature of the solute and solvent, pH and temperature and also to perform and observe salting-out process. The organic compounds namely: Acetic acid, Benzoic acid, Sodium Benzoate, Dextrose and Cellulose were subjected under the organic solvent, Petroleum ether and water. Aniline, Diethyl amine, Naphthalene, Toluene, Benzoic Acid and Phenol were immersed in the solvents: water, HCL, NaOH and NaHCO 3. Meanwhile for salting –out process the compounds used were 1-Butanol, NaCl and water. The results revealed that solubility is affected by the the properties and features of the organic compounds subjected, temperature and pH. Moreover, the principle, “Like dissolves like” was evident showing that polar solutes are miscible in polar solvents and non-polar are soluble in non-polar solvents.
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I. INTRODUCTION The science of organic chemistry deals with the relationship between molecular structure and properties. Organic compounds are identified through their physical and chemical properties. According to Identification of a Substance by Physical . (n.d.),a physical property is anything that does not change the chemical or physical structure of a compound which can be used to determine the structure of a compound, how pure a substance is, and how to decontaminate a substance from a compound. For this experiment, we will focus on one of the physical properties of an organic compound which is solubility. As defined by Solubility. (n.d.), it is a substance’s ability to dissolve in a solvent and is extremely useful for predicting whether the substance will dissolve in water, acid, base, or organic solvents, determining molecular structure, and to purify a solid for recrystallization. There are 3 types of solutions based on their capacity to dissolve a solute; the saturated solutions, unsaturated solutions, and supersaturated solutions. Supersaturated solutions often form crystals, this process is called crystallization. According to Brown in his book Chemistry: The Central Science (2012), crystallization is the opposite of dissolution, it happens when the concentration of the solute in the solution increases beyond its maximum, the chances that some solute particles will collide with the surface of the solid and reattach also increases.
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  • Spring '15
  • Dr. Elombre
  • Solubility, Solvent, Chemical polarity

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