PH=12 c(0H-)=0.01
PH=1 c(H+)=0.1
PH=2 c(H+)=0.01
设盐酸和火碱溶液的体积分别为V1、V2
0.1V1-0.01V2=0.01(V1+V2)
0.09V1=0.02V2
V2/V1=2/9