Question

向0.1mol/lHCl溶液中通H2S气体至饱和（0.1mol/l）,溶液中S2-的浓度为多少

Answer 1

H2S=H+ HS-Ka1=c(H+)*c(HS-)/c(H2S) c(H+)=0.1 c(H2S)=0.1 解出c（HS-）=9.1*10^-8HS-=H+ +S2-Ka2=c(H+)*c(S2-)/c(HS-) c(H+)=0.1 c(HS-)=9.1*10^-8 解出c（S2-）=1.009*10^-19