实验 | 实验操作和现象 |
1 | 测定溶液的 |
2 | 向溶液中通入少量 |
3 | 向20mL溶液中逐滴加入等浓度NaOH溶液10mL |
4 | 配制的、、三种溶液 |
A.实验1溶液中存在: |
B.实验2反应的离子方程式: |
C.实验3反应后的溶液中存在: |
D.实验4中各溶液pH大小: |
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