# Molar Mass Of Methyl Alcohol: Pre-Lab Experiment

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Pre-Lab Questions 1. A determination of the molar mass of methyl alcohol (CH3OH) yielded the following data. Temperature of boiling water bath 99.5o C Barometric pressure 738 mm Hg Temperature of room temperature water 24.0o C Density of room temperature water 0.9973 g/mL Trial 1 Mass of empty pipette 1.557g Mass of piet and condensed methyl alcohol 1.571g Mass of pipet and water 16.001g Mass of condensed methyl alcohol 0.014g Mass of water in filled pipet 14.444g Volume of pipet 14.483mL Molar mass of methyl alcohol (experimental) 28.69 g/mol Molar mass of methyl alcohol (theoretical) 32.05 g/mol Using the data, fill in the rest of the table. The volume of the pipet is equal to the volume of water inside the pipet. Use the relationship of mass and density to determine this volume. Once the volume of the…show more content…
The following mistakes were made when carrying out the experiment. What effect does each have on the calculated molar mass? Be specific. For example, too large because… Only part of the pipet was immersed in the boiling water, so the temperature in part of the pipet was less than that of the water bath. If the temperature was less than the water bath in some places because only part of the pipet was immersed in the boiling water, the molar mass calculated would become lower. This is because the ideal gas law temperature value would be too low, therefore lowering the overall