hemistry 1215, Experiment #12; Determination of the AtomicWeight of an Unknown Metal, Post-lab Name____________________________________ 1. A student who was measuringthe atomic weight of a metal failed to thoroughly clean her metalribbon leaving an oxide coat on the metal. Will the volume ofhydrogen gas generated be lower or higher than the true value? 2.What volume will 5.00 g of helium gas occupy at 0.800 atmospheresand 25 o C? 3. Use Dalton’s law of partial pressures to calculatethe pressure of hydrogen gas collected over water if the ambientpressure is 710 mm Hg and the temperature is 25o C. 4. A studentdidn’t equalize the water levels inside the eudiometer tube withthat of his water bath. The water level inside the tube was 10 cmhigher than the water level outside the tube. He ignored thedifference and proceeded with his calculations. What effect willthis error have on his calculated atomic mass? Explain yourrationale.
