实验序号 | 反应温度(℃) | Na2S2O3浓度 | 稀硫酸 | H2O | ||
V/mL | c/(mol/L) | V/mL | c/(mol/L) | V/mL | ||
1 | 20 | 10.0 | 0.10 | 10.0 | 0.50 | 0 |
2 | 40 | 10.0 | 0.10 | 10.0 | 0.50 | 0 |
3 | 20 | V1 | 0.10 | 4.0 | 0.50 | V2 |
A.设计该实验的基本思想为控制变量法 |
B.实验1和2可探究温度对反应速率的影响 |
C.若用实验1和3探究稀硫酸浓度对该反应速率的影响,则需V1=10.0,V2=6.0 |
D.若实验1不再产生沉淀的时间为5min,则 |
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