实验 | 实验操作和现象 |
1 | 将溶于蒸馏水,配制溶液,测得溶液的 |
2 | 向溶液中加入等浓度等体积的盐酸,测得溶液的 |
3 | 向溶液中加入等浓度等体积的溶液,产生白色沉淀 |
4 | 向溶液中滴入稀盐酸至溶液 |
A.实验1的溶液中存在: |
B.实验2的溶液中存在: |
C.实验3的清液中存在: |
D.实验4过程中溶液不存在: |
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