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Gen Chem, Factors Affecting Solubility

by coffeecat91
Tags: affecting, chem, factors, solubility
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coffeecat91
#1
May3-09, 05:57 PM
P: 3
1. The problem statement, all variables and given/known data

Calculate the mass of nitrogen dissolved at room temperature in an 80.0L home aquarium. Assume a total pressure of 1.0 atm and a mole fraction for nitrogen of .78.

2. Relevant equations

Mole fraction= moles solute/moles solution

Sgas=KH x Pgas

KH = 6.1 x 10-4 M/atm

3. The attempt at a solution

Sgas = (6.1 x 10-4)(1 atm)
Sgas = 6.1 x 10-4
6.1 x 10-4/ 1 L x 80.0 L = 4.88 x 10-2 moles
(4.88 x 10-2 moles) x 28.02 g Ns/ 1 mol = 1.37 g N2

the correct answer is 1.1 g N2
Where did I go wrong and where does the mole fraction bit come into play? Thanks!
1. The problem statement, all variables and given/known data



2. Relevant equations



3. The attempt at a solution
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Borek
#2
May4-09, 02:10 AM
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P: 23,363
Quote Quote by coffeecat91 View Post
Where did I go wrong and where does the mole fraction bit come into play?
Partial pressure.


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