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下列离子方程式书写正确的是( ) A.氯化钡溶液中通入二氧化碳气体:Ba2++CO2+H2O=BaCO3↓+2H+ B.次氯酸钙溶液中通人少量SO2气体:Ca2++2ClO一+SO2+H2O=CaSO3↓+2HClO C.醋酸和碳酸氢钠溶液混合:CH3COOH+HCO3-=CO2↑+H2O+CH3COO- D.碳酸氢镁溶液中加入过量石灰水: Mg 2 ++2HCO
+Ca 2 ++2OH -=CaCO 3↓+2H 2O+MgCO 3↓
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