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Tag : Mel-Temp

Crystallization; Decolorization; Identification of an Unknown using Mel-Temp

The purpose of this experiment was to develop new laboratory techniques and apply them by purifying and identifying an unknown. Table 1: Reagents in the Experiment Compound Ethanol Acetone Toluene Other Designation Grain Alcohol Dimethyl ketone Methylbenzene Compound Class Polar Polar Covalent Polar Covalent Lewis Structure Boiling Point 78 degrees Celcius 56 degrees Celcius 110.6 degrees Celcius Melting Point -114.1 degrees Celcius -95 degrees Celcius -95 degrees Celcius Specific Gravity 0.79 g/cm3 0.79  g/cm3 0.86 g/cm3 Water Solubility Miscible Complete […]

Melting Point and Boiling Point

The purpose of this experiment was to observe the purity of a compound by testing its melting or boiling point. When a chemical is at a melting point, the vapor pressure of its solid phase is equal to that of the liquid phase. Impurities like H20 will lower the melting point of a compound. Reagents Tested: Cinnamic Acid Urea Pentane Analysis: Boiling Point of Pentane Pentane boils at about a third of the temperature of boiling water (see Table A […]