Experiement 12 lab report chem2 PDF

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Experiment 12- Molar Mass of a Volatile Liquid Author- Aunlaje Farmer Date- October 1, 2021 Objective(s)- To measure the physical properties of pressure, volume, and temperature for a gaseous substance and to determine the molar mass of a volatile liquid Safety Precautions1. Wear personal protective equipment including gloves and appropriate eye wear 2. Do not touch any chemicals with bare hands 3. Use cation around open flames and/or hot plates and handling hot glassware Report SheetD. Calculations Trial 1

Trial 2

Trial 3

Moles of vapor

0.0104 mol

0.0104 mol

0.0104 mol

Mass of vapor

0.20g

0.22g

0.24g

Molar mass of compound

19.23 g/mol

21.15g/mol

23.08g/mol

Average molar mass: 20.15g/mol Laboratory QuestionsQuestion 5: Suppose the thermometer is miscalibrated to read 0.3 degrees Celsius higher than actual. Does this error in calibration result in the molar mass of the vapor in the flask being reported too high, too low, or unaffected? Explain. The molar mass would be too high, when trying to find the moles of vapor using a temperature that is too high it would calculate the moles as lower then it should be. Then when you divide the mass of the vapor by the too low mole the molar mass would be to high. Question 6: If the volume of the flask is assumed to be 125mL instead of the measured volume, would the calculated molar mass of the unknown liquid be too high, too low, or unaffected by this experimental error? Explain. The calculated molar mass would be too high. When calculating the moles of vapor using a volume that is lower than it actually is the calculated moles would be to low. In turn causing the molar mass to be too high....