①S →点燃O2 SO2 →BaCl2(aq) BaSO4
②CuSO4(aq) →过量NaOH(aq) Cu(OH)2悬浊液 →Δ葡萄糖 Cu2O
③饱和NaCl(aq) →NH3,CO2 NaHCO3 →Δ Na2CO3
④Fe2O3 →HCL(aq) FeCl3(aq) →Δ 无水FeCl3.
A:①③
B:②③
C:②④
D:①④
Take your time, Henry. The ship is arriving in _______ forty minutes.
试剂:4% H2O2溶液,12% H2O2溶液,1mol/LFeCl3溶液
仪器:试管、带刻度的胶头滴管、酒精灯