redox reaction..urgent!!

Ｈ(Hydrogen)中只有一粒質子和一粒電子，所以ＯＮ沒有可能是２。
既然沒有可能是２，即Ｈ的ＯＮ只可能是０或１。
所以Ｏ(Oxygen)的ＯＮ是－１，
Ｈ－－Ｏ－－Ｏ－－Ｈ
１　－１　－１　　１
ＯＮ是要看其中的電子，所以先看Ｈ再看Ｏ。
因為出Ｈ２的standard electrode potential比出Ｏ２低，所以不會出Ｈ２。
H2O2(aq) → 2H+(aq) + O2(aq) + 2e-　
希望解答到你 ^^

2007-12-01 18:18:14 補充：
Oxygen has an oxidation number of -2 in almost all of its compounds, exceptions are provided by the peroxides,　　　　２－　Ｏ－Ｏ－１　－１the oxidation numbers in the peroxide ion being calculated by splitting the shared pair equally between the two oxygen atoms.

2007-12-01 18:19:28 補充：
In all compounds, except ionic metallic hydrides, the oxidation number of hydrogen is +1

2007-12-01 18:20:22 補充：
In compounds containing more than two elements, the oxidation number of any one of them may have to be obtained by first assigning reasonable oxidation numbers to the other elements.

2007-12-01 18:20:49 補充：
In sulphuric acid, the most reasonable oxidation numbers for hydrogen and oxygen are +1 and -2, which gives sulphur an oxidation number of +6.　⊕　　　　　㊀Ｋ　　ＭｎＯ　　　　　　４　　　　　Ｏ　㊀　⊕　　　｜Ｋ　　Ｏ－Ｍｎ－Ｏ　　　　　｜　　　　　Ｏ＋１　　　－２　　＝＞　Ｍｎ：＋６