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Prelab for Gas Law Constant SD

front 1

About how much water should be used to calibrate the eudiometer tube?

  • 10 mL
  • 20 mL
  • 40 mL
  • 50 mL
  • 30 mL

back 1

40 mL

front 2

How will the conversion factor "f" for eudiometer tube (ET) calibration be calculated?

back 2

Real volume from buret/Reading from ET

front 3

What is the mole ratio of magnesium to hydrogen gas in the reaction used in this experiment?

back 3

1:1

front 4

A eudiometer tube (ET) is found to have a conversion factor "f" of 0.81 mL/ET unit. The experimental procedure for this lab is followed and produces a reading on the ET tube of 40.40 mL. What is the actual volume of hydrogen gas in the ET (in Liters)? Report the answer to 4 significant figures.

back 4

0.81 x 40.40 x (1 L / 1000 mL) = 0.03272 L

front 5

How many moles of hydrogen gas are generated by 0.038 grams of magnesium? Report the answer to four significant figures. DO NOT USE EXPONENTS.

back 5

0.038 g Mg x ( 1 mol Mg / 24.31 g Mg ) x ( 1 mol H2 / 1 mol Mg ) = 0.001563 mol