A.向银氨溶液中滴加乙醛: CH3CHO +2[Ag(NH3)2]+ + H2OCH3COO- + NH4+ +3NH3 + 2Ag↓+2H+ |
B.苯酚钠溶液中通入少量CO2: |
C.硫酸氢铵溶液中滴加少量NaOH溶液:H++NH4++2OH-=NH3·H2O+H2O |
D.氯乙酸与足量的氢氧化钠溶液共热:CH2ClCOOH+OH—△CH2ClCOO—+H2O |
A.向淀粉碘化钾溶液中滴加稀硫酸,在空气中放置一段时间后溶液变蓝:4H++4I-+O2=2I2+2H2O |
B.向K2Cr2O7溶液中滴加少量浓硫酸,溶液变为黄色: Cr2O72-(橙色)+H2O 2CrO42-(黄色)+2H+ |
C.0.01 mol·L-1NH4Al(SO4)2溶液与0.02 mol·L-1Ba(OH )2溶液等体积混合有白色沉淀生成: Al3++2SO42-+2Ba2++4OH-=2BaSO4↓+AlO2-+2H2O |
D.用铜电极电解饱和食盐水:2Cl-+2H2OCl2↑+H2↑+2OH- |
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