Show how the conversion factor "f" was calculated. Show all work with units. Include a verbal description of each number used...for example 39.00 mL (volume added from buret). If these instructions are not followed, 0 points will be awarded.
f (fudge factor) = 40.00 mL (real volume from buret) / 40.50 mL (ET reading) = 0.9877
Report the following data:
a) Temperature in degrees C?
b) Mass of Mg?
c) Total pressure?
d) Vapor pressure of water?
a) Temperature in degrees C = 23.5 degrees C
b) Mass of Mg = 0.0410 g Mg
c) Total pressure = 767.8 torr
d) Vapor pressure of water = 21.717 torr
Show how the following quantities are calculated for Trial 1. Show all work with units. Include a verbal description of each number used...for example 39.00 mL (volume added from buret). If these instructions are not followed, 0 points will be awarded.
a) Volume of H2 gas?
b) Temperature in K?
c) Moles of H2?
d) Pressure of dry H2 gas?
a) Volume of H2 gas = 0.9877 (fudge factor) x 40.50 mL (ET reading) x (1 L / 1000 mL) = 0.04000 L
b) Temperature in K = 23.5 degrees C (temperature in degrees C) + 273 (Kelvin) = 296.5 K
c) Moles of H2 = 0.0410 g Mg (mass of Mg) x (1 mol Mg / 24.31 g Mg) x (1 mol H2 / 1 mol Mg) = 0.00169 mol H2
d) Pressure of dry H2 gas = (767.8 torr (total pressure) - 21.717 torr (vapor pressure of water)) x (1 atm / 760 torr) = 0.9817 atm
Show how R is calculated for Trial 1. Show all work with units. Include a verbal description of each number used...for example 39.00 mL (volume added from buret). If these instructions are not followed, 0 points will be awarded.
R = (0.9817 atm (pressure of dry H2 gas) x 0.04000 L (volume of H2 gas)) / (0.00169 mol H2 (moles of H2) x 296.5 K (temperature in Kelvin)) = 0.0784 L atm/mol K
Your instructor will give you instructions as what to do with this box. It may be used for bonus points, or for taking away points (for example late submissions) or for error analysis if something went wrong during the lab. If no instructions have been provided to you, please leave this box blank.
5% = 5
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