编号 | 酸性溶液体积/mL | 溶液体积/mL | 水的体积/mL | 反应温度/℃ | 褪色时间/min |
Ⅰ | 2 | 2 | 0 | 20 | 2.1 |
Ⅱ | 2 | 1 | 20 | 5.5 | |
Ⅲ | 2 | 0 | 50 | 0.5 |
A.若改用酸性溶液,也能达到实验目的 |
B., |
C.实验Ⅰ、Ⅲ的目的是探究温度对化学反应速率的影响 |
D.实验Ⅲ中用浓度变化表示的反应速率 |
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