题目:
下列反应的离子方程式中正确的是( )
A.钠与水反应: Na+2H2O = Na+ +2OH-+H2↑
B.氢氧化钡溶液和硫酸铵溶液混合:Ba2++SO42-= BaSO4↓
C.硫化钠溶于水呈碱性:S2-+ H2O HS- + OH-
D.向溴化亚铁溶液中通入少量氯气:Cl2+2Br-=2Cl-+Br2
答案:
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