实验装置 | 实验编号 | 浸泡液 | pH | 氧气体积分数随时间的变化 |
① | 5 | |||
② | 5 | |||
③ | 7 | |||
④ | 7 |
①;
②;
③。
下列说法错误的是
A.铁钉吸氧腐蚀的负极总反应式为 |
B.上述实验的正极反应式均为 |
C.由实验可知,铁钉在中性溶液中比在弱酸性溶液更难被腐蚀 |
D.和相比浸泡液存在带相同电荷数的,使铁钉更难腐蚀 |
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