A.氢氧化钠溶液 | B.醋酸溶液 |
C.熔融氯化钾 | D.FeSO晶体 |
A.①②③④ | B.④②③① | C.④③②① | D.②④③① |
A.NaOH+HCl====NaCl+H2O |
B.CaCO3+2HCl====CaCl2+CO2↑+H2O |
C.Zn+2HCl====ZnCl2+H2↑ |
D.MnO2+4HCl(浓)MnCl2+Cl2↑+2H2O |
A.2Fe3++SO2+2H2O====2Fe2+++4H+ | B.I2+SO2+2H2O====2H2SO4+2HI |
C.H2O2+H2SO4====SO2↑+O2↑+2H2O | D.2Fe2++I2====2Fe3++2I- |
A.杠杆A端下倾 |
B.杠杆B端下倾 |
C.杠杆先A端下倾,后B端下倾 |
D.杠杆仍在水平位置平衡 |
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