Question

Adding powdered Cu and Zn to a
solution containing 1.0M is each of
Cu2+ and Zn2+ ions would result into
the formation of:
1) More of Cu and Zn2+ ions
2) More of Zn and Cu2+ ions
3) More of Zn and Cu
4) More of Zn2+ and Cu2+ ions
​

Answer 1

Adding powdered Cu and Zn to a  solution result into  the formation of 1) More of Cu and Zn²⁺ ions.

Explanation:

• The electrochemical cell of zinc and copper comprises zinc as anode; copper as cathode and solutions of their sulfates as electrolytes.
• The oxidation takes place on zinc and reduction takes place on copper.
• The zinc atoms donate electrons to from Zn²⁺ ions and copper atoms gain electrons to form copper. The reactivity of zinc is higher compared to copper.
• In this process, the entire zinc gets dissolved.
• When more amount of copper and zinc is added, then again the zinc readily reacts with copper to form Zn²⁺ ions and copper metal is deposited.