At 25oC in a closed system, ammonium hydrogen sulfide exists as the following equilibrium:

a. When a sample of pure NH4HS(s) is placed in an evacuated reaction vessel and allowed to come to equilibrium at 25oC, total pressure is 0.660 atm. What is the value of Kp?
b. To this system, sufficient H2S(g) is injected until the pressure of H2S is three times that of the ammonia at equilibrium. What are the partial pressures of NH3 and H2S?
c. In a different experiment, 0.750 atm of NH3 and 0.500 atm of H2S are introduced into a 1.00-L vessel at 25oC. How many moles ofNH4HS are present when equilibrium is established?

Transcribed Image Text:

NH4HS(s)NH3(g) H2S(g)