(1)处于安全和绿色化学考虑,在制取硫酸铜时,可选用下列的物质是
a.Cu b.CuO c.CuS d.CuSO4·Cu(OH)2∙H2O
(2)装置a的作用是
(3)已知样品质量为ag,得到Cu2S是bg,则样品中CuS质量分数是
(4)根据以上信息,说明铜与浓硫酸反应需要控制哪些条件?
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