(1)Fe Fe + 2Fe 3+=3Fe 2+(2)饱和NaHCO 3溶液 H ++HCO 3 -= H 2O+CO 2↑
(3)CO 2CO 3 2-+ CO 2+H 2O="2" HCO 3 -(4)H 2O 3NO 2+H 2O="2" H ++2NO 3 -+NO
(1)Fe Fe + 2Fe 3+=3Fe 2+(2)饱和NaHCO 3溶液 H ++HCO 3 -= H 2O+CO 2↑
(3)CO 2CO 3 2-+ CO 2+H 2O="2" HCO 3 -(4)H 2O 3NO 2+H 2O="2" H ++2NO 3 -+NO