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# 数轴讨论法 在书写离子方程式及计算中的应用

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• 1amolCl2bmolFeBr2nmolFeBr2xmolCl2 xn/2 xn x=n

• 2amolKAL(SO4)bmolBa(OH)2ab

• 3agAlNaHbgH2

• 4amol1mol FeO+C=Fe+CO 2FeO+C=2Fe+CO2 ______________ _____________ a1/4 a4 a

• 1: CaC2Be2C, Al4C3, Mg2C3, Li2C2,CaC2C2H2,,,Be2C+ H2OMg2C3+ H2OLi2C2+ H2O.

• 2:CaC2+ 2H2OCa(OH) 2+ C2H2, Al4C3:________________________Al4C3:________________________

• 3,,,,: ,_____,_________ ___,____,:___________

• Be2C_______________________________ A B C D

• 4: H+ ,K+ , Mg2+,Cl ,OH,NO3,CO3 :_______________ :_______________

• 5: CD

• DA DA+H2OC+D MNP A. M B. N,P C. M D. E. ,AE

• . 1:B

• aAB _____ B____ aAaB __________B______________ ________________

• 2:2Fe+3Br2=2FeBr3, 2Fe3+ +2I = 2Fe2++ I2,Fe (NO3)2 HNO3 H2SO4Fe2+Fe3+A B C D

• 3Fe(NO3)2Fe2++2H2O Fe(OH)2+2H+ _________________ _________

• 4Fe2+Fe2+Fe3+C A BFe3+ CC DCFe3+Fe2+ D

• 5 FeS2Na2O2 H2S2 H2O2 :A .H2S B. S C . FeS D .FeCl2C

• . 1 A. O2+4e+2H2O4OH B. O2+4e+2H2O4OH C. C6H12O6CO2HCO3 D. C6H12O6 CO2HCO3 AC

• 2Na+Al2O32NaxS=Na2Sx: A B C D Sx22e xSAD

• 3MgAlNaOH: A. Mg Mg2e=Mg2+ B .Al Al+4OH3e = AlO2+ 2H2O C. MgAl D .MgBD

• 4:KOH: A BKOH C D71C

• 5:Y2O3ZrO2O2 C4H10 O2 :

• 102C4H1013O28 CO210H2O O24e 2O2 C4H1013O2 26e 4 CO25 H2O

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