Question

问：沉淀生成后溶液中c(Ag+）,还有沉淀后溶液PH？

Answer 1

AgNO3 + HCl = AgCl(沉淀) + HNO3
n(AgNO3) = 0.018*50/1000 = 0.0009 mol
n(HCl) = 0.020*50/1000 = 0.0010 mol
HCl 过剩：过剩的HCl的物质的量= 0.0010-0.0009 = 0.0001 mol
设混合后溶液体积为二者体积之和,则溶液体积V=50+50 =100ml = 0.1L
Ksp = c(Ag+)*c(Cl-) = 1.0*10^(-10) (mol/L)^2
此时溶液中Cl-的浓度为：c(Cl-)= 0.0001mol/0.1L = 0.001 mol/L =1*10^(-3) mol/L
则 c(Ag+) = Ksp/c(Cl-) = 1.0*10^(-7) mol/L
c(H+) = n(HCl)/V = 0.0010mol/0.1L = 0.01 mol/L
pH = -lg(c(H+)) = 2.,5,问：沉淀生成后溶液中c(Ag+）,还有沉淀后溶液PH
向50mL0,018mol/L的AgNO3溶液中逐滴50ml0.020mol/L的盐酸,若AgCl的Ksp=c（Ay+）．c(Cl-）等1.0*10的负10次方（mol/L)平方