Question

Electroplating is commonly used to coat metal objects with other metals. A student wanted to electroplate a zinc ring with copper.
What object would be the cathode in this process? ( 1 mark)

What would be the electrolyte? ( 1 mark)



What would be the anode ( 1 mark)


How does the mass of the anode change during electroplating? ( 1 mark)


State another application of electrolysis. ( 1 mark)

Answer 1

Answer:

1. Zinc would be the cathode in this process.

2. The electrolyte would be any salt solution of copper like copper sulphate.

3. Copper would be the anode in this process.

4. Mass decreases as the reacting anode material becomes aqueous. Site of reduction: electrons are gained by the ions around the cathode. These ions are the oxidizing agent because by taking electrons, they cause the anode to be oxidized.

5. Production of hydrogen gas from water by electrolysis