A.金属铝溶于稀硫酸中:Al + 2H+= A13+ + H2↑ |
B.碳酸锌溶于稀硝酸中:CO32-+ 2H+=H2O + CO2↑ |
C.醋酸钠水溶液中通入足量CO2:2CH3COO-+ CO2+ H2O= 2CH3COOH + CO32- |
D.少量Cl2通入KI溶液中:Cl2+ 2I-=2C1-+ I2 |
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