Hydrogen sulfide, H 2 S, is a toxic gas. Thesolubility of H 2 S in water at 0 o

Question

Hydrogen sulfide, H2S, is a toxic gas. Thesolubility of H2S in water at 0oC and under 1atm gas phase H2S is 0.195M. a. What is the Henry's law constant of H2S at0oC? b. What is the solubility of H2S in water if theparital pressure of H2S is 25.5 Torr? Please show steps so I can understand how you got the answer.Thank You. Hydrogen sulfide, H2S, is a toxic gas. Thesolubility of H2S in water at 0oC and under 1atm gas phase H2S is 0.195M. a. What is the Henry's law constant of H2S at0oC? b. What is the solubility of H2S in water if theparital pressure of H2S is 25.5 Torr? Please show steps so I can understand how you got the answer.Thank You.

Explanation / Answer

      According to Henrylaw the solubility of the gas in a liquid is proportional to thepressure of the gas over the solution.                          C P                         C = kP        C = molarconcentration         k = Henryconstant    0.195 = k x 1 atm            k= 0.195 mol / L.atm     when the pressure P =25.5 torr = (25.5 /760) = 0.0335 atm, The solubility of H2S is              C = 0.195 x 0.0335                  = 0.00654 M

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