2:PH=12的氢氧化钡溶液中钡离子、由水电离出的氢氧跟浓度为?
2.pH=12,则c(0H)=0.01mol/L,c(Ba+)=1/2Xc(OH)=0.005mol/L
由水电离的OH浓度=C(H+)=Kw/c(0H)=1x10mol/L