Question

In a lab about the activity series, a solution of copper(II)chloride is placed in a test tube with zinc metal. If zinc is higher up on the activity series, it will produce a reaction and replace the copper. Bits of copper are seen in the bottom of the test tube. A good conclusion would be? A) Zinc is lower on the activity series because there is no evidence of a reaction. B) Zinc is higher on the activity series because there is no evidence of a reaction. C) Zinc is lower on the activity series because there is clear evidence of a reaction. D) Zinc is higher on the activity series because there is clear evidence of a reaction.

Answer 1

Answer:

Option D, Zinc is higher on the activity series because there is clear evidence of a reaction.

Explanation:

It is very clear that a metal which is higher in activity will replace a metal having lower activity.  

Since, Zinc has higher activity than copper, it is very sure that it in a copper chloride solution it will replace copper and produce zinc chloride solution leaving behind copper as residue.  

Residues of copper is a clear evidence of reaction  

The chemical equation for this reaction would be -

$CuCl_2 + 2Zn^+ -----> 2ZnCl + Cu^{2+}$

Hence, option D is correct