# Problem: The Henry's law constant (k H) for O2 in water at 20°C is 1.28 x 10 -3 mol/L•atm. How many grams of O2 will dissolve in 1.75 L of H 2O in contact with air, where the partial pressure of O2 is 1.32 atm?A. 0.0541 gB. 0.0473 gC. 0.0946 gD. 0.0270 gE. 0.946 g

###### FREE Expert Solution
88% (354 ratings)
###### FREE Expert Solution

We’re being asked to determine the mass of O2 that will dissolve in 1.75 L H2O.

Recall that the solubility of a gas is given by Henry’s law:

$\overline{){{\mathbf{S}}}_{{\mathbf{gas}}}{\mathbf{=}}{{\mathbf{k}}}_{{\mathbf{H}}}{\mathbf{·}}{{\mathbf{P}}}_{{\mathbf{gas}}}}$

where:

Sgas = solubility of the gas (in mol/L or M)

kH = Henry’s law constant for the gas

Pgas = partial pressure of the gas

88% (354 ratings)
###### Problem Details

The Henry's law constant (k H) for O2 in water at 20°C is 1.28 x 10 -3 mol/L•atm. How many grams of O2 will dissolve in 1.75 L of H 2O in contact with air, where the partial pressure of O2 is 1.32 atm?

A. 0.0541 g

B. 0.0473 g

C. 0.0946 g

D. 0.0270 g

E. 0.946 g

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Henry's Law concept. You can view video lessons to learn Henry's Law. Or if you need more Henry's Law practice, you can also practice Henry's Law practice problems.

What is the difficulty of this problem?

Our tutors rated the difficulty ofThe Henry's law constant (k H) for O2 in water at 20°C is 1....as medium difficulty.

How long does this problem take to solve?

Our expert Chemistry tutor, Sabrina took 5 minutes and 7 seconds to solve this problem. You can follow their steps in the video explanation above.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Roychowdhury's class at RUTGERS.