OA段为BaSO4,
Ba(OH)2+2HNO3=Ba(NO3)2+2H2O
Ba(NO3)2+MgSO4=BaSO4+Mg(NO3)2
AB为BaSO4和Mg(OH)2.
BC段SO4消耗完毕,只剩下了Mg2+,OA段剩余的.
Mg2+ + 2OH- =Mg(OH)2
OA段为BaSO4,
Ba(OH)2+2HNO3=Ba(NO3)2+2H2O
Ba(NO3)2+MgSO4=BaSO4+Mg(NO3)2
AB为BaSO4和Mg(OH)2.
BC段SO4消耗完毕,只剩下了Mg2+,OA段剩余的.
Mg2+ + 2OH- =Mg(OH)2