What is the concentration of Oxygen in the water?

Question

Oxygen is dissolved in water with the total pressure of gas (Oxygen + water vapor) over the water being 2.00 atm.

The temperature is 25o C. What is the concentration of Oxygen in the water?

Give your answer in g/L .

The vapor pressure of water at 25.0oC is 23.8 mm Hg.


Note that kH has units of: (mol/L) / (mm Hg)


Enter a numeric answer only, do not include units in your answer

Answer 1

a) convert atm to mmHg
b) get the pressure by taking the answer you obtained in a and subtract the 23.8 mmhg
c) use equation Sg=KhPg
(you can find the Kh value in the 700's of your text book)
Pg is the value you obtained in part b
d) convert this answer to moles

Answer 2

I guess you can use my question as a ref.

Oxygen is dissolved in water with the total pressure of gas (Oxygen + water vapor) over the water being 2.60 atm. The temperature is 25o C. What is the concentration of Oxygen in the water?
Give your answer in g/L .
The vapor pressure of water at 25.0oC is 23.8 mm Hg.

Note that kH has units of mol/L
--------
mm Hg


Enter a numeric answer only, do not include units in your answer




Correct, computer gets: 0.103700864

Hint: Use the law of partial pressures to find vapor pressure of Oxygen
Top

This is how I solved it:

(2.60)*(760)=1976-23.8=1952.2*1.66*10^-6=.003240652*32=.103700864

Answer 3

This is the third question about Chemistry you have asked.
Why don't you try to do your homework by yourself???