Naphthalene Lab Report

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I. INTRODUCTION Different compounds can be classified based on the various chemical and physical properties such as solubility, conductivity, and melting point. Most of the chemical substances have unique features that allows sorting them to ionic, molecular, macromolecular and metallic compounds. Significantly, compounds divides into polar and non-polar, which can be checked by testing with polar and non-polar solvents. Electrical resistance related to the ability of the substance conduct electricity. Resistivity measured by ohmmeter classifies compound with under 2000 ohms as good conductors, which are usually aqueous ionic and solid metallic, between 2000-20,000 ohms as weak conductors, and above 20,000 ohms are non-conducting such as…show more content…
However, it dissolved in non-polar solvent toluene and slightly in ethanol, which means naphthalene is non-polar. It has high resistivity in aqueous solution and solid form, and respective melting point. The sample was given as solid with large shiny white crystals. Silicon carbide was classified in this experiment as macromolecular structure. This compound was insoluble at any type of solvent both polar and non-polar. It has non-conducting properties and extremely high boiling point. The reason is that macromolecular compounds have giant covalent structure arranged in lattices. All the bonds are involved in the lattices so that there are no electrons to conduct electricity and hard to break the strong covalent bonds. Chunk antimony was presented as black powder that is not soluble in any substance. It has high melting point, which suggest that this is metallic compound. However, experimental results of the conductivity shows non-conducting properties of the chunk antimony. This result allows driving the conclusion that resistivity measurement in this experiment was inaccurate as in the measurement of ionic

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