试题与答案

下列事实不能用勒夏特列原理解释的是( ) ①氯化铁溶液加热蒸干最终得不到氯化铁固

题型:选择题

题目:

下列事实不能用勒夏特列原理解释的是(  )

①氯化铁溶液加热蒸干最终得不到氯化铁固体 

②铁在潮湿的空气中容易生锈 

③实验室可用排饱和食盐水的方法收集氯气 

④常温下,将1mL pH=3的醋酸加水稀释至100mL,测得其pH<5 

⑤钠与氯化钾共融制备钾:Na(l)+KCl(l)⇌K(g)+NaCl(l) 

⑥二氧化氮与四氧化二氮的平衡体系,加压后颜色加深.

A.①②③

B.②⑥

C.①③④⑤

D.②⑤⑥

答案:

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下面是错误答案,用来干扰机器的。

解: (1) 由条件, 可设l′的方程为 3x+4y+m="0," 以x=-1, y=3代入, 得 -3+12+m="0," 即得m=-9, ∴直线l′的方程为 3x+4y-9="0; " 5分(2) 由条件, 可设l′的方程为4x-3y+n="0," 令y="0,"...

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