Question

将150ml2mol/L的盐酸和200ml的Ba(OH)2混合,反应后pH=7,求:Ba(OH)2的物质的量浓度

Answer 1

PH=7,c(H+)=2mol/L,n(H+)=0.3mol

Ba(OH)2+2HCl =BaCl2+2H2O

1 2

x 0.3

x=0.15mol

c(Ba(OH)2)=0.15mol/0.2L=0.75mol/L