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下列各组物质间可能包括多步反应,其总的离子方程式正确的是 [ ] A.向NaClO溶液中通入过量SO2: ClO-+ SO2+H2O =HClO-+HSO3- B.向AlCl3溶液中投入过量Na: Al3++4Na+2H2O= AlO2-+4Na+ +2H2↑ C.向FeBr2溶液中通入少量Cl2: 2Fe2++4Br- +3Cl2 =2Fe3+ +2Br2 +6Cl-D.向明矾溶液中滴加Ba(OH)2溶液,恰好使SO42-沉淀完全: 2Al3++3SO42-+ 3Ba2++6OH-=2Al(OH)3↓+3BaSO4↓
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