please solve :-

Asked by  | 4th Apr, 2008, 02:10: PM

Expert Answer:

Given: solubility of H2S gas = 0.195m
             It means 0.195 moles of H2S is dissolved in 1 Kg of solvent(water).
            
 
                                                                                         
      
                                                                                       1000
              Solution:        1 Kg of solvent contains =-------------
                                                                                        18
                                                                                       
 
                                                                             =55.5moles
                                                                                                                        nH2S
                                      Mole fraction of H2S gas in solution ,XH2S=   
                                                                                                                     nH2S+nH2O                                                                                                                          
                                                
 
                                                                                                                      0.195
                                                                                                          =
                                                                                                                   0.195+55.55
 
 
                                                                                                             =0.0035
                                     Pressure at STP=0.987bar=1 atm
                                  
                                      pH2S=KH X    xH2S
                                                            
                                                          
                                                            0.987
                                           KH =
                                                       0.0035
 
 
                                                    =282bar
 
 

Answered by  | 6th Jul, 2008, 11:08: AM

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