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

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

Step-by-step 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