注:碱式碳酸铜受热分解温度为200℃
A.“沉淀”时的反应为: |
B.若“沉淀”时有5Cu(OH)2·2CuCO3生成,则产品中铜元素的质量分数会偏低 |
C.若在最后一次的洗涤液中滴加BaC12溶液,无白色沉淀生成则说明洗涤干净 |
D.“烘干”时为节省时间,可以选取在高温下进行 |
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