SO2+2Fe3++2H2O=SO+2Fe2++4H+
Cr2O+6Fe2++14H+=2Cr3++6Fe3++7H2O
下列有关说法正确的是
A.还原性Cr3+>Fe2+>SO2 |
B.氧化性Cr2O>SO>Fe3+ |
C.Cr2O能将Na2SO3氧化成Na2SO4 |
D.两个反应中Fe2(SO4)3均作还原剂 |
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