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posted by  Googley45 on 9/10/2008 8:18:35 PM  |  status: Closed  

Find concentration given partial pressure and Henry's constant

Course Textbook Chapter Problem
General Chemistry N/A N/A N/A
Question Details:
Calculate the concentration of argon in lake water at 20?C. The partial pressure of argon
is 0.0090 atm and Henry’s constant is 0.0015 mol ·L−1 ·atm−1.

1. 1.4 × 10−5 M
2. 1.5 × 10−3 M
3. 0.17 M
4. 9.0 × 10−3 M
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Sage
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posted by Jesley on 9/10/2008 9:13:22 PM  |  status: Live
Asker's Rating: Lifesaver   
Googley45's comment:
"Thanks for the explanation "
Response Details:
Henry's law states that the solubility of a gas in a liquid is proportional to the pressure of the gas over the solution
            c =kP
where, k= henry's constant = 0.0015 mol ·L−1 ·atm−1.
pressure, P = 0.0090 atm
concentration , c= (0.0015 mol ·L−1 ·atm−1)*(0.0090 atm )
                                = 1.35x10-5 mol/L
                                        ˜ 1.4x10-5M
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