查表得到HF的Ka
F- + H2O == HF + OH-,K=Kw/Ka
c-x……………x……x
c=0.1mol/L,[HF]=[OH-]=x,则[F-]=c-x
K = Kw/Ka = x^2/(c-x)
可解得x
pH = 14 - pOH = 14 + log[OH-] = 14 + log x
查表得到HF的Ka
F- + H2O == HF + OH-,K=Kw/Ka
c-x……………x……x
c=0.1mol/L,[HF]=[OH-]=x,则[F-]=c-x
K = Kw/Ka = x^2/(c-x)
可解得x
pH = 14 - pOH = 14 + log[OH-] = 14 + log x