A.碳酸氢钠溶液与足量石灰水反应:HCO3-+Ca2++OH-=CaCO3↓+H2O | ||||
B.鸡蛋壳在醋酸溶液中溶解有气泡产生:CaCO3+2H+=Ca2++H2O+CO2↑ | ||||
C.电解CuSO4溶液:2Cu2++2H2O
| ||||
D.亚硝酸钠水溶液显碱性:NO2-+H2O⇌HNO2+OH- |
| ||
A.N
| ||
B.S2-+2H2O⇌H2S+2OH- | ||
C.CH3COOH+H2O⇌CH3COO-+H3O+ | ||
D.CH3COOH+OH-⇌CH3COO-+H2O |
A.用过量氨水吸收工业尾气中的SO2:2NH3•H20+SO2═2NH4++SO32-+H2O | ||||
B.氯化钠与浓硫酸混合加热:H2SO4+2Cl-
| ||||
C.磁性氧化铁溶于稀硝酸:3Fe2++4H++NO3-═3Fe3++NO↑+3H2O | ||||
D.明矾溶液中滴入Ba(OH)2溶液使SO42-恰好完全沉淀:2Ba2++3OH-+Al3++2SO42-═2BaSO4↓+Al(OH)3↓ |
A.三氯化铝溶液中加入过量氨水:Al3++3OH-═Al(OH)3↓ | ||
B.4mol•L-1的NaAlO2溶液和7mol•L-1的HCl等体积互相均匀混合:4Al
| ||
C.K37ClO3与浓盐酸(HCl)在加热时生成氯气:K37ClO3+6HCl=K37Cl+3Cl2↑+3H2O | ||
D.将25mL 0.1mol•L-1盐酸缓缓滴入25mL 0.1mol•L-1Na2CO3溶液中,并不断搅拌:2H++CO32-=CO2↑+H2O |
© 2017-2019 超级试练试题库,All Rights Reserved.