A.铁和稀盐酸反应2Fe+6H+=2Fe3++3H2↑ |
B.碳酸钙溶于稀盐酸中 CO32-+2H+=CO2+H2O |
C.碳酸氢钠溶液与盐酸反应HCO3-+H+=CO2+H2O |
D.氧化铜与盐酸反应 O2― +2H+=H2O |
A.Zn+2H + = Zn2++H2↑ |
B.CH3COOH+OH―= CH3COO―+H2O |
C.Ba2++ 2OH―+ 2H++ SO42―= BaSO4↓+2H2O |
D.CH3COOH + NH3·H2O = CH3COO―+ NH4+ + H2O |
A.向NaHCO3溶液中滴加少量澄清石灰水; Ca2++2OH―+2HCO3―= CaCO3↓+CO32―+2H2O |
B.NaOH溶液中加入过量稀硫酸: H3O+ + OH―= 2H2O |
C.澄清石灰水中滴加NaHSO4溶液至中性: Ca2+ + OH―+H+ + SO42―= CaSO4↓+H2O |
D.Na2CO3溶液中加入等物质的量的乙酸: CO32―+ CH3COOH = HCO3―+CH3COO― |
A.稀硝酸和Fe | B.NaAlO2溶液和盐酸 |
C.AlCl3溶液和氨水 | D.CO2通入NaOH溶液 |
A.硫酸铜溶液和氢氧化钡溶液混合:Cu2+ +SO42-+ Ba2++2OH- |
B.Na2CO3溶液中加入醋酸:CO32-+2H+ |
C.澄清石灰水与少量小苏打溶液混合:Ca2+ + OH-+ HCO3- |
D.将金属Al加入强碱溶液中:2Al+2OH-+2H2O |
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