If hydrogen sulfide concentrations are greater than 0.15 mg S/L,it is harmful to fish health, calculate the minimum safe pH, if thetotal sulfide concentration is determined to be 20 micrometers.Assume this is a closed system and there is no H2Stransfer with the atmosphere. pKa1= 7, pKa2=12 for H2S. Molar mass for sulfur is 32g/mol
