How many kilogram of oxygen gas can be didsolved in 1dmetre cube of water ar 20°c. If it's partial pressure is 0.20atm.Kh for O2 at 20°c is 4.58 * 10000 atm

Dear Student,

Please find below the solution to the asked query:

Given , volume of water = 1dm³ = 1Litre
​            Partial pressure of Oxygen =0.2 atm
             K_H= 4.58 $\times$ 10⁴ M/atm

​Using Henry's Law,
Concentration of Oxygen = Henry's Law Constant $\times$Partial pressure
                                       = ​4.58 $\times$ 10⁴ M/atm $\times$0.2 atm
                                      = 0.916 $\times$ ​10⁴ M

Moles of Oxygen in 1 litre = Volume $\times$ Concentration
                                           =  1L  $\times$  ​ 0.916 $\times$ ​10⁴ M
                                          = ​ 0.916 $\times$ ​10⁴ mol

Mass of Oxygen = no.of moles $\times$molar mass of oxygen
                          =   0.916 $\times$ ​10⁴  $\times$  32 
                         = 29.312 ​ $\times$ ​10⁴  g
                         = 293.12 kg

   Therefore,    293.12 kg  of Oxygen must be dissolved .


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