We’re being asked to rank the relative concentrations of each gas in the aqueous solution from highest to lowest.
Recall that the solubility of a gas is given by Henry’s law:
Sgas = solubility of the gas (in mol/L or M)
kH = Henry’s law constant for the gas
Pgas = partial pressure of the gas
The Henry's law constant of each gas can be found in books or the internet:
An aqueous solution is in equilibrium with a gaseous mixture containing an equal number of moles of oxygen, nitrogen, and helium. Rank the relative concentrations of each gas in the aqueous solution from highest to lowest.
a) [O2] > [N2] > [He]
b) [He] > [N2] > [O2]
c) [N2] > [He] > [O2]
d) [N2] > [O2] > [He]
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