# Oxidation of Hydrogen Peroxide equation help

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#1

Can someone possibly explain how i would come about constructing this? I came up with
H2O2 -> O2 +2H+ +2e-
but this is wrong.

Could someone possibly explain this?

Posted from TSR Mobile
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6 years ago
#2
(Original post by Mutleybm1996)

Can someone possibly explain how i would come about constructing this? I came up with
H2O2 -> O2 +2H+ +2e-
but this is wrong.

Could someone possibly explain this?

Posted from TSR Mobile
This is correct.
0
#3
(Original post by charco)
This is correct.
Sorry, I came up with 8H+ +5H2O2 -> 8H2O +5O2 +8e-
which is wrong.
I understand that the 8G+ is wrong, i just don't understand why there is the 2H+ in the correct answer.
Sorry, I'm being stupid!

Posted from TSR Mobile
0
6 years ago
#4
(Original post by Mutleybm1996)
Sorry, I came up with 8H+ +5H2O2 -> 8H2O +5O2 +8e-
which is wrong.
I understand that the 8G+ is wrong, i just don't understand why there is the 2H+ in the correct answer.
Sorry, I'm being stupid!

Posted from TSR Mobile
When constructing half equations in acid conditions you can add produce hydrogen ions and /or water.

H2O2 gets oxidised as the oxygen atoms in the -1 oxidation state change to zero. There are 2 oxygen atoms therefore 2 electrons are removed.

H2O2 --> O2 + 2e

You can see that the only thing missing are hydrogen ions from the right hand side.

H2O2 --> O2 + 2e + 2H+
0
#5
(Original post by charco)
When constructing half equations in acid conditions you can add produce hydrogen ions and /or water.

H2O2 gets oxidised as the oxygen atoms in the -1 oxidation state change to zero. There are 2 oxygen atoms therefore 2 electrons are removed.

H2O2 --> O2 + 2e

You can see that the only thing missing are hydrogen ions from the right hand side.

H2O2 --> O2 + 2e + 2H+
H2O2 gets oxidised as the oxygen atoms in the -1 oxidation state change to zero. There are 2 oxygen atoms therefore 2 electrons are removed.

May I ask how you know this?
I'm getting A's in Chemistry, I just despise redox with a passion :/

Posted from TSR Mobile
0
6 years ago
#6
(Original post by Mutleybm1996)
H2O2 gets oxidised as the oxygen atoms in the -1 oxidation state change to zero. There are 2 oxygen atoms therefore 2 electrons are removed.

May I ask how you know this?
I'm getting A's in Chemistry, I just despise redox with a passion :/

Posted from TSR Mobile
Redox is not that difficult once you get the hang of the oxidation number concept and the corresponding rules.

1. The sum of the oxidation states of the atoms in a species equals the charge on the species.

2. Groups 1 and 2 metals exhibit group oxidation numbers.

3. Oxygen is always -2 unless with fluorine (+2) or in peroxides (-1) or the element (0)

4. Hydrogen is either +1, 0 or -1

5. The most electronegative element takes a negative oxidation state when combined with other elements.
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