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Hydrogen Sulfide gas has toxicity comparable to Hydrogen Cyanide, but because of its intense odor its presence is observed at concentrations well below toxic levels. A mixing ratio of 100 ppmV can be lethal to humans over an extended time, What ar the equilibrium concentrations of H2S and HS- in water in an atmosphere containing that concentration of the gas?

What is the solubility of H2S when the gas is bubbled through water. Assume 25C for both calculations

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