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 Dimethylformaldehyde Methylbenzene Compound Class Non-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 Insoluble […]

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 […]