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Topic: About water I understand H2 is H+ but why is O2, O2-?  (Read 784 times)

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Offline bear_007

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About water I understand H2 is H+ but why is O2, O2-?
« on: December 25, 2019, 06:43:54 AM »
I am really confused.

So Hydrogen exists as a molecule H2 because as by itself it is H+ since it is missing 1 electron.

Now oxygen baffles me. Oxygen exists because 2 electrons are shared from both oxygen atoms to make the outer orbital 8 electrons so its full up hence O2. By itself, the single oxygen atom would be O2+ and not O2-.

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Offline bear_007

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Re: About water I understand H2 is H+ but why is O2, O2-?
« Reply #1 on: December 25, 2019, 06:45:12 AM »
so why is this lady saying O2- at the end of the video?

https://www.youtube.com/watch?v=J9PhkhwELqo
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Offline chenbeier

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Re: About water I understand H2 is H+ but why is O2, O2-?
« Reply #2 on: December 25, 2019, 08:36:19 AM »
In Water H2O Hydrogen has given it electrons to Oxygen. So you have 2 H+ and 1 O2-

 In Solution the electrolysis reaction is more complicatet.

KATHODE 2H+ + 2e- => H2
ANODE 4 OH- => 2 H2O + O2 + 4 e-
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