First slide

General discussion of solutions

Question

1 kg of water under a nitrogen pressure of 1 atmosphere dissolves 0.02 gm of nitrogen at 293 K. Calculate Henry's law constant:

Moderate

A

7 .7 x 10⁴atm
B

7 .7 x 10³ atm
C

2 x 10^-5 atm
D

2 x 10^-2 atm

Solution

$P_{N_{2}} = {(K_{H})}_{N_{2}} X_{G a s} 1 = {(K_{H})}_{N_{2}} \times (\frac{0.02 / 28}{\frac{0.02}{28} + \frac{1000}{18}}) {(K_{H})}_{N_{2}} = 7.7 \times 10^{4} a t m$

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