Question

**Knowing that at 0 ^{o}C and an oxygen pressure
of 1.00 atm, the aqueous solubility of O_{2} (g) is 48.9 mL
O2 per liter. The approximate values for the molarity of
O_{2} (g) in solution and the partial pressure of
O_{2} above a 8.23 x 10^{-4} M O2 (g) saturated
aqueous solution at 0 ^{o}C are respectively:**

A. 2.18 M and 3.78 x 10^{-4} atm

B. 2.18 x 10^{-3} M and 0.378 atm

C. 0.0446 M and 0.0179 atm

D. 44.6 M and 1.84 x 10^{-5} atm

Answer #1

Knowing that at 0 oC and an oxygen pressure
of 1.00 atm, the aqueous solubility of O2 (g) is 48.9 mL
O2 per liter. The approximate values for the molarity of
O2 (g) in solution and the partial pressure of
O2 above a 8.23 x 10-4 M O2 (g) saturated
aqueous solution at 0 oC are respectively:
A. 2.18 M and 3.78 x 10-4 atm
B. 2.18 x 10-3 M and 0.378 atm
C. 0.0446 M and 0.0179 atm
D....

The solubility of CO2 in a salt water lake at 298 K and 750 torr
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solution. The Henry’s Law constant in this case is 3.0 x 10-2
mol/L.atm. Please find the partial pressure of CO2 (g) (PCO2, in
atm) in the air above the lake (2) Please use your answer to
determine the percentage of CO2 in the atmosphere (2) Given the
percentage of CO2 in the atmosphere...

Equilibrium Chemistry:
Assume that aqueous concentrations equal activities, and that
reactions take place at 25 degrees celsius.
a). Consider the following reaction in a dilute solution:
O2 (g) = O2 (aq)
Keq=1.386*10-3
The concentration of dissolved oxygen (O2 (aq)) in
wastewater is 10-4 M. Assume that the activity of
gaseous oxygen (O2 (g)) equals the partial pressure in
the atmosphere (PO2 = 0.203 atm). Will O2 (g)
dissolve or evolve from the wastewater if T=25 degrees celsius?
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1.) Indicate which aqueous solution has the lowest vapor
pressure:
a. 0.2 M MgCl2 b. 0.1 M
MgCl2 c. 0.2 M NaCl d. 0.1
M KCl e. 0.1 M Na2CO3
2.) Indicate which aqueous solution has the fastest evaporation
rate.
a. 0.2 M MgCl2 b. 0.1 M
MgCl2 c. 0.2 M NaCl d. 0.1
M KCl e. 0.1 M Na2CO3
3.) What is the molarity of a sucrose
(C12H22O11) solution that produces
an osmotic pressure of 2.65 atm at 25°C?...

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