Question

室温时,若1mL pH=1的盐酸与100ml NaOH溶液混合后pH=7,求NaOH溶液的浓度和pH.

Answer 1

n(HCi)=n(NaOH)

1mL pH=1的盐酸n(HCl)=0.001L*10^-1mol/L=10^-4mol

100ml NaOH溶液n(NaOH)=0.1L*c(NaOH)=10^-4 c(NaOH)=10^-3mol/L

NaOH溶液氢离子的浓度：c(H+)=Kw/c(NaOH)=10^-11

PH=11