A.
| B.
| C.
| D.
|
1 |
m |
1 |
xmol |
1 |
n |
1 |
ymol |
(2y-4x)mol |
aL |
A.AlCl3=Al3++3Cl- |
B.Na2CO3=2Na++CO32- |
C.Ba(OH)2=Ba2++2 OH- |
D.CH3CH2OH(乙醇)=CH3CH2O-+H+ |
A.将固体CuO加入稀H2SO4中:CuO+2H+=Cu2++H2O |
B.氢氧化钡与硫酸反应:Ba2++H++SO42-+OH-=BaSO4↓+H2O |
C.把金属铁放入稀硫酸中制取氢气:2Fe+6H+=2Fe3++3H2↑ |
D.石灰石与盐酸反应制取二氧化碳:CO32-+2H+=CO2↑+H2O |
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