已知:①CeO2不溶于稀硫酸,也不溶于NaOH溶液;②SiO2不溶于酸(氢氟酸除外)。
回答下列问题:
(1)稀酸A是
(2)操作①的名称为
(3)滤渣2是
(4)滤液2中发生反应的化学方程式为:2Ce2(SO4)3+12NaOH+O2+2甲=4Ce(OH)4↓+6Na2SO4,甲的化学式是
(5)硫酸铁铵[NH4Fe(SO4)2]中Fe元素的化合价为
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