1. Scuba drivers breathing air at increased pressure can suffer from nitrogen narcosis-a condition resembling drunkenness-when...

1. Scuba drivers breathing air at increased pressure can suffer from nitrogen narcosis-a condition resembling drunkenness-when the partial pressure of nitrogen exceeds about 4 atm. What property of gas/water solutions causes this to happen?

2. Calculate the mass of nitrogen dissolved at room temperature in an 80.0 L home aquarium. Assume a total pressure of 1.0 atm and a mole fraction for Nitrogen of 0.78. (K_H for N2 = 6.1 x 10^-4 M/atm)

Expert Solution

1.

The partial pressure + diffusivity of gases will cause nitrogen to remain in blood and to diffuse faster than O2

2.

Apply Henry law

Mi = H*Pi

Mi = (6.1*10^-4)(0.78) = 0.0004758 mol of N2 per liter of solution

V = 80 L so

mol = MV =0.0004758*80 = 0.0038064mol of N2

mass = mol*MW = 0.0038064*28 = 0.1065792 g of N2 = 106 mg of N2

queen_honey_blossom answered 2 years ago

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