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精练本三轮攻克化学方程式第一轮30.C+20u0高温20u+C0,↑1.2HCl+CaCO3=CaCl2+H20+CO231.C0+Cu0△Cu+C022.2KMn0,△K,Mn0,+Ma0,+0,↑32.3C+2Fe,0,高遇4e+30,↑MnO23.2KC10,33.Fe20,+3H2S04一Fe2(S04)3+3H20由无色变=2KC1+302↑为黄色MnO4.2H20=2H20+02↑34.Cu0+H2S04=CuS04+H20由无色变为蓝色35.Fe,03+6HCl=2FeCl,+3H205.C+0点燃C0236.A120+3H2S0,—A12(S04)3+3H206.S+0,点燃s0,微弱的淡蓝色蓝紫色刺激性37.HCl+Na0H—:NaCl+H2O气味38.3HC1+A1(0H)3=A1CL3+3H20点燃2H,039.2HC1+Ca(0H)2=CaCl2+2H207.2H2+0淡蓝色40.H2S0,+2Na0H=Na2S04+2H208.2C+02点燃20041.HCl+KOH=KCI+H,042.2HCl+Na2CO,=2NaCl+H20+CO29.4P+50点燃2P,0,白烟43.HCl+NaHCO,NaCl+H,0+CO210.4A1+30,—2A120344.H2S0,+Na,C03=Na2S0,+H20+C02↑11.2Mg+02点燃2MgO耀眼的白光白色固体45.H,S0,+Ba(N03)2=2HN0,+BaS04↓12.20u+0,△20046.Ca(OH)2+Na2 CO,=2NaOH+CaCO,47.13.3Fe+20,点燃Fe0.Ca(OH)2+CuSO,=Cu(OH)24+CaSO黑色固体48.2NaOH+MgSO,=Mg(OH)2 I +Na2SO14.2C0+0,点燃2C0,蓝色49.2NaOH+CuSO=Cu(OH)24+Na2SO50.2Na0H+CuCl2—Cu(0H)2↓+2NaCl15.CH+20点燃C02+2H2051.Na,S0,+BaC2—BaS04↓+2NaCl16.C2H,0H+30点燃2C0,+3H,052.NaCl+AgNO3AgC↓+NaNO,酶53.CuSO,+BaCl2CuCl2+BaS04↓17.C,Hz0。+6026C02+6H,054.Na,CO,+BaCl,=BaCO,+2NaCl18.C02+Ca(0H)2一CaC0,↓+H,0白色沉淀19.C02+2Na0H=Na2C03+H2055.2H,0通电2H,↑+0,120.Zn+H2S04一ZnS04+H2↑有气泡产生56.C+C0高温2C021.Mg+H2S04—MgS04+H2↑57.Ca0+H,0Ca(OH)222.Fe+2HC—FeCl2+H2↑气泡由无色变为浅绿色高温Ca0+C0,t58.CaC0323.2A1+6HC1—2A1CL,+3H2↑59.H,C03=H,0+C02t24.Fe+CuS04一Cu+FeS04红色固体由蓝色变为60.C02+H20=H2C0,浅绿色第二轮25.Zn+CuS0=Cu+ZnSO26.2A1+3CuS04=3Cu+Al2(S04)31.3C0+Fe203商温2Fe+3C0,27.Cu+2AgNO,-2Ag+Cu(NO3)22.Fe+CuSO,=FeSO,+Cu28.3C0+Fe,03高温2Fe+3C023.4Al+302=2A1,03红棕色粉末变为黑色4.Fe,0,+3H2S04=Fe2(S04)3+3H2029.H,+0u0△Cu+H,0黑色粉末逐渐变为红色5.3HC1+A1(0H)3=A1CL3+3H,02
