向FeCl2和MgCl2的混合溶液中,加入一定量的锌粉,充分反应后过滤,

向FeCl2和MgCl2的混合溶液中,加入一定量的锌粉,充分反应后过滤,得到滤渣和滤液.该滤渣中一定含有的物质是  ,一定不含有的物质是  ;滤液中一定含有的物质是  

答案

【考点】金属的化学性质.

【专题】金属与金属材料.

【分析】在金属活动性顺序中,只有排在氢前的金属才可以和稀酸溶液(除稀硝酸)反应生成氢气,只有前面的金属才可以和排在它后面的金属从盐溶液中置换出来,可以根据这一规律判断反应的发生或物质的存在.

【解答】解:因为金属的活动性顺序是:镁>锌>铁,向FeCl2和MgCl2的混合溶液中,加入一定量的锌粉,Zn能置换出Fe,不能置换出镁Mg,分反应后过滤,得到滤渣和滤液.该滤渣中一定含有的物质是Fe,一定不含有的物质是Mg;滤液中一定含有的物质是:MgCl2和ZnCl2

故答为:Fe;Mg;MgCl2和ZnCl2

【点评】本题主要考查了学生对金属活动顺序表的运用以及半定量(如一定量、过量、少量等)概念的理解和掌握.

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