A.H2SO4 | B.HCl | C.NaOH | D.NaNO3 |
A.H2SO4→HCl→K2S→NaOH→CO2 | B.Na2SO4→NaCl→Na2S→NH3·H2O |
C.NaCl→Na2SO4→H2S→NaOH | D.Na2S→Na2SO4→NaCl→NaOH |
A.3 | B.5 | C.8 | D.12 |
A.Na+ | B.I- | C.S2- | D.Cl- |
A.①②⑤ | B.①②③④ | C.②③⑤ | D.全部 |
A.用醋酸除去水垢: |
B.苯酚与碳酸钠反应: |
C.苯酚钠溶液中通入少量CO2: |
D.乙酸乙酯与氢氧化钠溶液反应: |
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