November 25, 2024, 03:33:10 AM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: Redox half-equations  (Read 4126 times)

0 Members and 1 Guest are viewing this topic.

chemistrie

  • Guest
Redox half-equations
« on: December 25, 2004, 09:20:52 PM »
I know that oxygen acr as a oxidising agent in redox reactions, there are 2 half equations for the chemical change of oxygen. One is O2(g) changes to 2 oxide ions. But the other one is O2(g) + 2H2O(l) + 4e is changed to 4 hydroxide ions, how does that happen? Can anyone give an example for that?
Logged

Offline Donaldson Tan

  • Editor, New Asia Republic
  • Retired Staff
  • Sr. Member
  • *
  • Posts: 3177
  • Mole Snacks: +261/-13
  • Gender: Male
    • New Asia Republic
Re:Redox half-equations
« Reply #1 on: December 26, 2004, 06:23:39 PM »
half reactions can occur backwards too.

discharging of hydroxide ions to yield oxygen during electrolysis follows the reaction you mentioned:

4OH- => 2H2O + O2 + 4e
Logged
"Say you're in a [chemical] plant and there's a snake on the floor. What are you going to do? Call a consultant? Get a meeting together to talk about which color is the snake? Employees should do one thing: walk over there and you step on the friggin� snake." - Jean-Pierre Garnier, CEO of Glaxosmithkline, June 2006
Pages: [1]   Go Up
« previous next »
Sponsored Links