Potassium superoxide reacts violently with water to produce potassium hydroxide, hydrogen peroxide, and oxygen gas: 2K20(s) + 2H20(1) 2KOH(aq) + H2 02 (aq) + === 02 (g) Calculate the volume of gas that was produced if 350g of K20 reacted with an excess of water and the gases were collected in a eudiometer at 250C (where the partial pressure of water vapor is 17.54 mm Hg) and the atmospheric pressure that day was 747 mm Hg. By the end of the experiment, the water column rose 4.75cm above the surface of the water in the beaker where the eudiometer was submerged. (You will need to remember that the density of mercury is 13.6 g/mL to make the pressure adjustment)

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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Potassium superoxide reacts violently with
water to produce potassium hydroxide,
hydrogen peroxide, and oxygen gas:
2K2O(s) + 2H2O(1) :
2KOH(aq) + H2 02 (aq) +
===
02 (g)
Calculate the volume of gas that was produced
if 350g of K20 reacted with an excess of water
and the gases were collected in a eudiometer at
250C (where the partial pressure of water vapor
is 17.54 mm Hg) and the atmospheric pressure
that day was 747 mm Hg. By the end of the
experiment, the water column rose 4.75cm
above the surface of the water in the beaker
where the eudiometer was submerged. (You
will need to remember that the density of
mercury is 13.6 g/mL to make the pressure
adjustment)
Transcribed Image Text:Potassium superoxide reacts violently with water to produce potassium hydroxide, hydrogen peroxide, and oxygen gas: 2K2O(s) + 2H2O(1) : 2KOH(aq) + H2 02 (aq) + === 02 (g) Calculate the volume of gas that was produced if 350g of K20 reacted with an excess of water and the gases were collected in a eudiometer at 250C (where the partial pressure of water vapor is 17.54 mm Hg) and the atmospheric pressure that day was 747 mm Hg. By the end of the experiment, the water column rose 4.75cm above the surface of the water in the beaker where the eudiometer was submerged. (You will need to remember that the density of mercury is 13.6 g/mL to make the pressure adjustment)
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