(1)Ni的价电子排布式为
(2)为加快红土镍矿的溶解,在酸浸步骤中可以采取的措施是
(3)“沉铁”中若采用Na2CO3作为除铁所需钠源,Na2CO3溶液的用量对体系pH和镍的损失影响如图1所示。当Na2CO3溶液的用量超过6g/L时,镍的损失率会增大,其可能的原因是
(4)若溶液中c(Mg2+)为0.1mol/L,溶液的体积为1L,则要使溶液中c(Mg2+)=7.4×10-7mol/L,则应加入固体NaF为
(5)硫酸钠与硫酸镍晶体溶解度曲线图如图2所示,请设计由滤液Y制备NiSO4·6H2O的实验方案:
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