依题意得 硝酸处理后沉淀质量减少到4.66克,此为BaSO4
n(Na2SO4)==n(BaSO4)=4.66/233=0.02mol
BaCO3的质量==14.51-4.66=9.85g
n(Na2CO3)==n(BaCO3)==9.85/197=0.05mol
则 C(Na2CO3)==0.05/0.05=1.00mol/L
C(Na2SO4)==0.02/0.05=0.40mol/L
依题意得 硝酸处理后沉淀质量减少到4.66克,此为BaSO4
n(Na2SO4)==n(BaSO4)=4.66/233=0.02mol
BaCO3的质量==14.51-4.66=9.85g
n(Na2CO3)==n(BaCO3)==9.85/197=0.05mol
则 C(Na2CO3)==0.05/0.05=1.00mol/L
C(Na2SO4)==0.02/0.05=0.40mol/L