A.硫化钠溶液和硝酸混合:S2-+2H+=H2S↑ |
B.明矾溶液与过量氨水混合:Al3++4NH3+2H2O=AlO+4NH |
C.硅酸钠溶液中通入二氧化碳:SiO+CO2+H2O=HSiO+HCO |
D.将等物质的量浓度的Ba(OH)2和NH4HSO4溶液以体积比1∶2混合:Ba2++2OH-+2H++SO=BaSO4↓+2H2O |
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2