



(1)“酸浸”时




(2)pH约为7的






A.将




(3)通过中和、萃取、反萃取、沉淀等过程,可制备






①加氨水“中和”去除过量盐酸,使溶液接近中性。去除过量盐酸的目的是
②反萃取的目的是将有机层


③与“反萃取”得到的水溶液比较,过滤

(4)实验中需要测定溶液中













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

