有A、B、C、D四种金属,将A与B用导线连接起来,浸入电解质溶液中,

ABCD四种金属,将AB用导线连接起来,浸入电解质溶液中,B不易腐蚀。将AD分别投入等物质的量浓度的盐酸中,DA反应剧烈。将铜浸入B的盐溶液里,无明显变化,如果把铜浸入C的盐溶液里,有金属C析出。据此判断它们的活动性由强到弱的顺序是______________

答案

【答案】DABC

【解析】试题分析:根据原电池原理:活泼金属作负极,被腐蚀,所以AB中活泼性AB;AD与等浓度盐酸反应时DA剧烈,所以DA;铜与B的盐溶液不反应,而与C反应置换出C,说明活泼性BC。即答案为DABC
考点:考查原电池的应用
点评:本题旨在应用原电池原理,判断金属活动性的强弱。解此类题首先要明确判断金属活动性的方法,抓其规律,中学阶段主要有以下几条:
应用原电池原理,作负极的金属的活动性比作正极的金属强;
与同浓度同种酸反应,反应剧烈的活泼性强;
金属之间的置换,即金属活动顺序;
依据元素在元素周期表中的位置。
学生应学会从多个角度比较判断金属单质金属性的强弱,理清思路,要培养解决综合性题目的能力,减少失误。

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