1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Which one is reducing and which is oxidising?

  1. May 24, 2010 #1
    When a question with two half equations set out like below, how do I tell which one is oxidising and which one is reducing? Do I have to apply the standard reduction potentials table?

    Co2+ + 2e- -> CO (s)
    Ag+ +e- -> Ag (s)

    Thank you.
  2. jcsd
  3. May 25, 2010 #2
    Remember, lose electrons oxidized, gain electrons reduced
  4. May 25, 2010 #3
    And as a memory aid:

    OIL. RIG

    Oxidation Is Loss. Reduction Is Gain (of electrons)
  5. May 25, 2010 #4


    User Avatar

    Staff: Mentor

    Assuming you were asked to say what will happen if both half cells are present - yes.

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook