用0.01mol/LH2SO4滴定0.01/LNaOH溶液,中和后加水至100mL.若滴定中点判断有误:...
问题描述:
用0.01mol/LH2SO4滴定0.01/LNaOH溶液,中和后加水至100mL.若滴定中点判断有误:...
用0.01mol/LH2SO4滴定0.01/LNaOH溶液,中和后加水至100mL.若滴定中点判断有误:①多加了一滴H2SO4②少加了一滴H2SO4(设一滴为0.05mol),则①和②c(H+)的比值是?
答
:①多加了一滴H2SO4 (设一滴为0.05mL),
c(H+)=0.01mol/L*2*0.05mL/100mL=0.00001mol/L=10^-5mol/L
②少加了一滴H2SO4(设一滴为0.05mL),
c(OH-)=0.01mol/L*2*0.05/100=10^-5mol/L
c(H+)=10^-14/10^-5=10^-9mol/L
则①和②c(H+)的比值是?
10^-5/10^-9=5*10^4