Question

Here is an electrode reaction: 

1. Cu → Cu²⁺ + 2e^– At which electrode (anode or cathode) would such a reaction take place? Is this an example of oxidation or reduction? 

2. A solution contains magnesium ions (Mg²⁺) iron (II) ions (Fe²⁺) and copper ions (Cu²⁺). On passing an electric current through this solution which ions will be the first to be discharged at the cathode? Write the equation for the cathode reaction. 

3. Why is carbon tetrachloride, which is a liquid, a non-electrolyte?

Answer 1

1. This reaction will take place at anode. It is an example of oxidation. 

2. Cu⁺⁺ ions. 

Cu⁺⁺ + 2e^– → Cu (at cathode). 

3. Carbon tetrachloride is a convalent compound.