【简答题】![](https://cos-cdn.shuashuati.com/shuashuati-web/2024-0521-0905-00/logo-new-ad743.png)
某化学兴趣小组对课本中介绍的三种金属Mg、Ti(钛)、Cu金属活动顺序进行了探究:
提出假设:
a、Ti的活动性比Mg强b、Mg的活动性比Cu强
实验设计:同温下取大小相同的这三种金属薄片,分别投入等体积等质量分数的足量的稀盐酸中,观察观象,
(1)三种金属加入盐酸前都先用砂布将表片擦亮,其目的是______.
(2)在下表填写有关现象和结论
TiMgCu与盐酸反应观象放出气泡缓慢放出气泡迅速快______结论原假设中______不正确,三种金属的活动顺序是
______>______>______
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