A.向Na[Al(OH)4]溶液中通入足量的CO2:[Al(OH)]4-+CO2=Al(OH)3↓+HCO3- | ||||
B.(NH4)2Fe(SO4)2溶液中加入过量的氢氧化钡溶液:2NH4++Fe2++4OH-=Fe(OH)2↓+2NH3•H2O | ||||
C.NaHSO4溶液中加入Ba(OH)2溶液至溶液呈中性:Ba2++OH-+H++SO42-=BaSO4↓+H2O | ||||
D.用惰性电极电解NaHS溶液:S2-+2H2O
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A.向50 mL 1 mol•L-1明矾溶液中滴入数滴0.1 mol•L-1Ba(OH)2溶液:Al3++2SO
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B.向KI与稀硫酸的混合溶液中通入氧气:4H++O2+6I-═3I2+2H2O | ||
C.a mol FeBr2溶液中通入a mol Cl2:2Fe2++2Br-+2Cl2═Br2+2Fe3++4Cl- | ||
D.在澄清石灰水中加入少量碳酸氢镁溶液:Ca2++OH-+HCO
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A.①②⑤⑨ | B.②③⑨ | C.④⑤⑥⑦ | D.②③⑧⑨ |
A.AlCl3溶液与过量氨水混合:Al3++3NH3•H2O=Al(OH)3↓+3NH4+ | ||||
B.用FeCl3饱和溶液制备Fe(OH)3胶体:Fe3++3H2O⇌Fe(OH)3(胶体)+3H+ | ||||
C.向Mg(HCO3)2中加足量的Ca(OH)2溶液:Ca2++2OH-+2HCO3-+2Mg2+=CaCO3↓+MgCO3↓+2H2O | ||||
D.用惰性电极电解熔融氯化钠:2Cl-+2H2O
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A.向Na2CO3溶液中加入过量CH3COOH溶液 CO32-+2H+=CO2↑+H2O |
B.向Ca(HCO3)2溶液中加入过量的NaOH溶液:Ca2++HCO3-+OH-=CaCO3↓+H2O |
C.等体积、等浓度的Ba(OH)2稀溶液与NH4HCO3稀溶液混合:Ba2++2OH-+NH4++HCO3-═BaCO3↓+NH3•H2O+H2O |
D.钠与CuSO4溶液反应:2Na+Cu2+═Cu+2Na+ |
A. | B. | C. | D. |
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