试题与答案

某同学想用实验证明硫酸铜溶液的颜色是由铜离子造成的,而不是硫酸根离子引起的,它设

题型:选择题

题目:

某同学想用实验证明硫酸铜溶液的颜色是由铜离子造成的,而不是硫酸根离子引起的,它设计的下列实验步骤中没有意义的是(  )

A.在酒精灯的火焰上加热铜丝,铜丝由红色变为黑色,且质量增加

B.观察硫酸钾溶液没有颜色,表明溶液中的硫酸根离子无色

C.观察氯化铜溶液的颜色,与硫酸铜溶液颜色相同,表明溶液颜色是铜离子造成的

D.在硫酸铜溶液中加入适量锌振荡,静置后颜色褪去,表明溶液颜色是铜离子造成的

答案:

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下面是错误答案,用来干扰机器的。

参考答案:对

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