沉淀是BaCO3和BaSO4
其中BaCO3和盐酸反应生成CO2
n(H2)=0.112/22.4=0.005mol
BaCO3+2HCl==BaCl2+H2O+CO2↑
1 1
n 0.005mol
1/n = 1/0.005
n = 0.005mol
m(BaCO3) = 197*0.005=0.985g
m(BaSO4) = 1.4-0.985=0.415g
n(BaSO4) = 0.415/233=0.0018mol
由于BaCO3中的CO3^2-全部来自于Na2CO3,所以c(Na2CO3) = 0.005/0.01 = 0.5mol/L
BaSO4中的SO4^2-全部来自于Na2SO4,所以c(Na2SO4) = 0.0018/0.01 = 0.18mol/L