Explain the production of electricity in the simple voltaic cell.
- Magnesium is more electropositive than copper. Magnesium is the negative terminal.
- Each magnesium atom donates two electrons to form a magnesium ion. Mg --> Mg2+ + 2e-
- The flow of electrons from the magnesium ribbon to the copper through the external circuit results in the production of electricity.
- The hydrogen ions from the electrolyte(sodium chloride solution) are discharged at the copper plate by accepting electrons to form hydrogen gas. 2H+ + 2e- --> H2
What is the observation at each of the terminal?
Please respond by leaving your answer in the comment box.
negative terminal - magnesium metal corrodes
ReplyDeletepositive terminal -bubbles of colourless gas produced
Alya, it's better to said magnesium strip becomes smaller/thinner than using "corrode"...Thanks for leaving your comments... Enjoy learning chemistry through chem2u..
ReplyDeleteokayy . thankyou teacher (:
ReplyDeleteHow about if we use potassium sulphate as electrolyte? Is there any changes?
ReplyDelete