9.下列反应的离子方程式书写正确的是( )
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A. | 过量铁加入到稀硝酸中:3Fe+8H++2NO3-═3Fe2++2NO2↑+4H2O | |
B. | 向AgCl悬浊液中滴加饱和KI溶液 AgCl+I-═AgI+Cl- | |
C. | 向NaAlO2溶液中通入过量CO2:2AlO2-+CO2+H2O═2Al(OH)3↓+HCO3- | |
D. | 向NaHCO3溶液中加入过量的澄清石灰水:2HCO3-+Ca2++2OH-═CaCO3↓+CO32-+2H2O |