试题与答案

工业上用铝土矿(主要成分是Al2O3,还有少量的Fe2O3、SiO2)提取冶炼铝

题型:填空题

题目:

工业上用铝土矿(主要成分是Al2O3,还有少量的Fe2O3、SiO2)提取冶炼铝的原料氧化铝。工艺流程如图

⑴原料A的名称是_____________,步骤①反应的离子方程式是_________________。

⑵滤液1中要加入稍过量原料B,原料B的化学式是________________,步骤②反应的离子方程式是:__________________________________________。

⑶步骤③的化学方程式是:_____________________________________________。

⑷如果省去步骤①,即溶解铝土矿是从加入原料B开始,则会对氧化铝的提取有什么影响____________________________________________________________。

答案:

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参考答案:5407940011解析:海关商品名称:印花的其他混纺合成纤维布海关商品备注:与精梳羊毛或动物细毛≥36%混纺,合纤

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