A:I'm going to draw an egg tomorrow.
B:I am drawing an egg now·
C:I want to draw a picture for my brother.
物质(括号内为杂质)
所用试剂及方法
A
H2O(H2O2)
MnO2过滤
B
除去CO中的少量H2O和CO2
先通过浓H2SO4,再通过NaOH溶液
C
CO2(CO)
过量O2点燃
D
Al(Al2O3)
足量稀H2SO4