A.铜片插入硝酸银溶液: Cu +Ag+= Cu2++Ag |
B.盐酸跟氢氧化镁反应: H++OH-= H2O |
C.向FeI2溶液中通入Cl2:2Fe2++Cl2= 2Fe3++2Cl- |
D.向明矾溶液中滴入Ba(OH)2溶液至完全沉淀:Al3++2+2Ba2++4OH-=2BaSO4↓+ |
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