Redox Reaction in Basic Solution

Practice Question Solving
1

I need to write a balanced half reaction for PO4 3- that becomes P2O3 in basic solution but my water and OH count is really off. Could someone help me out by explaining how they solved this? Thank you!

2

Okay so remember it’s slightly different in basic solutions these are the steps. THE FOURTH STEP is what’s different and that fourth step is added because it is in a basic solution.

  1. Balance elements other than H and O
  2. Add H2O to balance oxygen atams
  3. Add H+ ions to balance H atoms.
  4. Add the appropriate number of OH− to NEUTRALIZE all H+ added (which become water molecules on the opposite side of the reaction)
  5. make electrons on both sides equal, if not multiply by the lowest common multiple.
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3

Hey Romie!

Here is my solution, hope it will be a little helpful too:)

PS: apologies for the scribbly wibbly

[Album] imgur.com
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4

Thank you so much to both of you! Looks like I was just balancing the water for 4 oxygens instead of 8

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