Question

几种盐酸盐和硫酸盐的混合溶液中c(NH4+)=0.2mol/L,c(Cl-)=0.4mol/L,c(Al3+)=0.4m

Answer 1

答案选D.0.5mol/L

根据电荷守恒来做.

c(NH4)+3c(Al3+)=c(Cl-)+2c(SO4 2-)

c(SO4 2-)=[0.2mol/L+3*0.4mol/L-0.4mol/L]/2=0.5mol/L