溶液 | 滴入2滴酚酞溶液 | 滴入稀盐酸,溶液颜色变化 |
溶液 | 红色 | 红色→浅红色→无色 |
溶液 | 浅红色 | 浅红色→无色 |
A.碱性:溶液<溶液 |
B.含碳元素的质量:溶液=溶液 |
C.反应速率:溶液>溶液 |
D.溶质质量:溶液=溶液 |
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