Why do we use sulphuric acid for the electrolysis of water and not any other acid like nitric acid or sulphuric acid?

During the electrolysis of water, the anion from the electrolyte is in competition with the hydroxide ions of water to give up an electron. An electrolyte anion with less standard electrode potential than hydroxide will be oxidized instead of the hydroxide, and no oxygen gas will be produced.The most commonly used anion is sulfate (SO2−4), as it is very difficult to oxidize.Thus, sulphuric acid is most commonly used electrolyte in the electrolysis of water.

  • 0
What are you looking for?