题目内容

世博同学在探究铝、铜、银三种金属活动性顺序时做了如下实验,并由此得出了正确结论.
(1)请指出上述实验操作中的错误______;
(2)写出乙中发生反应的化学方程式______.
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在甲、乙两个实验中操作上的错误是,将胶头滴管伸入了试管内部.
铜排在银的前面,所以铜能置换银,所以铜片表面将会有银析出.
故答案为:(1)胶头滴管都倾斜伸入试管中;
(2)Cu+2AgNO3=Cu(NO32+2Ag.
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世博同学在探究铝、铜、银三种金属活动性顺序时做了如下实验,并由此得出了正确结论。

                                                                                         

                                                                                            

                                                                                                       

                                                                                      

                                                                                     

                                                                                         

(1)请指出上述实验操作中的错误                                           

(2)写出乙中发生反应的化学方程式                                          。                                                                                         

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