Question

1. Calculate the solubility of hydrogen in water at an atmospheric pressure of 0.410 atm (a typical value at high altitude). answer in M.

Atmospheric Gas Mole Fraction kH mol/(L*atm)

N2 7.81 x 10-1 6.70 x 10-4

O2 2.10 x 10-1 1.30 x 10-3

Ar 9.34 x 10-3 1.40 x 10-3

CO2 3.33 x 10-4 3.50 x 10-2

CH4 2.00 x 10-6 1.40 x 10-3

H2 5.00 x 10-7 7.80 x 10-4

Answer 1

kH=c/p

c=kHxp = 7.8e-4 x 0.41= 0.0003198 mol/L = 0.0003198 M.