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Fe2O3→ Fe H2 → H2O HCl →FeCl2 Na →NaOH
Cu＋2AgNO3＝2Ag＋Cu(NO3)2 NaOH＋HCl＝NaCl＋H2O NaCl＋AgNO3＝AgCl↓＋NaNO3 2HCl＋CaCO3＝CaCl2＋H2O＋CO2↑
Fe+HCl Cu+HCl Fe+Hg(NO3)2 Fe+HCl Fe+Hg(NO3)2 Cu+Hg(NO3)2 Fe+HCl Cu+HCl Cu+ Hg(NO3)2 Cu+HCl Fe+Hg(NO3)2 Cu+ Hg(NO3)2
Cu+2AgNO3=2Ag+ Cu(NO3)2 NaOH+HCl=NaCl+H2O NaCl+AgNO3=AgCl↓+NaNO3 2HCl+CaCO3=CaCl2+H2O+CO2↑
2Ag＋Cu（NO3）2＝2AgNO3＋Cu BaCl2＋H2SO4＝BaSO4↓＋2HCl Zn＋2HCl＝ZnCl2＋H2↑
(2a－1.6)g (2a－3.2)g 1.6ag 0.8ag
氯气与烧碱溶液反应：Cl2+2OH- = Cl- + ClO- + H2O 氯气与KOH溶液反应：Cl2+2OH- = Cl- + ClO- + H2O 盐酸与AgNO3溶液反应：HCl + Ag+ = H + AgCl↓ NaCl溶液与AgNO3溶液反应：Cl- + Ag+ = AgCl↓
Fe+HCl Cu+HCl Fe+Hg(NO3)2 Fe+HCl Fe+Hg(NO3)2 Cu+Hg(NO3)2 Fe+HCl Cu+HCl Cu+Hg(NO3)2 Cu+HCl Fe+Hg(NO3)2 Cu+Hg(NO3)2
（2a―3.2）g （2a―1.6）g 1.6ag 0.8ag
2FeCl2+Cl2===2FeCl3 Zn+Ag2O+H2O===Zn(OH)2+2Ag HCl+NaOH==NaCl+H2O 2H2+O2===2H2O
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