What is the molar concentration of O2 in water at 250C under atmospheric conditions where the partial pressure of O2 is 0.68 atm (Henry’s law constant for O2 in water is 1.3 x 10-3 mol/L atm)?

The molar concentration of oxygen gas is

Explanation:

To calculate the molar solubility, we use the equation given by Henry's law, which is:

where,

= Henry's constant =

= molar solubility of oxygen gas = ?

= partial pressure of oxygen gas = 0.68 atm

Putting values in above equation, we get:

Hence, the molar concentration of oxygen gas is