Question

50mLNa2SO4和Na2CO3的混合溶液中加入过量的BaCl2溶液,得到14.51g白色沉淀,向白色沉淀中加入过量的

Answer 1

m(BaCO3)=14.51g-4.66g=9.85g

m(BaSO4)= 4.66g n(BaCO3)= 9.85g÷197g/mol=0.05mol

n(BaSO4)= 4.66g÷233g/mol=0.02mol

m(Na2SO4) = 2.84 g

V(CO2)= 0.05mol×22.4L/mol=1.12L