PH=8 ,POH=6 [OH-]=1.0×10^-6 滴定完后溶液达到以下水解平衡 [HA] =[OH] [A-]约等于0.05 H2O + A- === HA + OH- 0.05 10^-6 10^-6 K(h)=K(W) / K(a) =(10^-6)(10^-6)/0.05=1/5×10^-10 K(a)=K(W)/(1/5×10^-14) =(1.0×10^-14)/(1/5×10^-10) =5×10^-4
PH=8 ,POH=6 [OH-]=1.0×10^-6 滴定完后溶液达到以下水解平衡 [HA] =[OH] [A-]约等于0.05 H2O + A- === HA + OH- 0.05 10^-6 10^-6 K(h)=K(W) / K(a) =(10^-6)(10^-6)/0.05=1/5×10^-10 K(a)=K(W)/(1/5×10^-14) =(1.0×10^-14)/(1/5×10^-10) =5×10^-4
PH=8 ,POH=6 [OH-]=1.0×10^-6 滴定完后溶液达到以下水解平衡 [HA] =[OH] [A-]约等于0.05 H2O + A- === HA + OH- 0.05 10^-6 10^-6 K(h)=K(W) / K(a) =(10^-6)(10^-6)/0.05=1/5×10^-10 K(a)=K(W)/(1/5×10^-14) =(1.0×10^-14)/(1/5×10^-10) =5×10^-4
PH=8 ,POH=6 [OH-]=1.0×10^-6 滴定完后溶液达到以下水解平衡 [HA] =[OH] [A-]约等于0.05 H2O + A- === HA + OH- 0.05 10^-6 10^-6 K(h)=K(W) / K(a) =(10^-6)(10^-6)/0.05=1/5×10^-10 K(a)=K(W)/(1/5×10^-14) =(1.0×10^-14)/(1/5×10^-10) =5×10^-4