A.制备Fe(OH)3胶体的化学方程式是 |
B.在制备Fe(OH)3胶体的实验中,加热煮沸时间越长,越有利于胶体的生成 |
C.Fe(OH)3胶粒能吸附正离子,从而使Fe(OH)3胶体带有一定电荷 |
D.将稀硫酸逐滴加入Fe(OH)3胶体中,开始产生红褐色沉淀,继续滴加沉淀溶解 |
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