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wht is oxidation no. ??? how to find it ???? is algebraic method applicable in complex molecules apart frm ur dtailed ans if u hav any link for REDOX REACTN plzzz send.......
Dear raj,
Electrochemical reactions involve the transfer of electrons. Mass and charge are conserved when balancing these reactions, but you need to know which atoms are oxidized and which atoms are reduced during the reaction. Oxidation numbers are used to keep track of how many electrons are lost or gained by each atom. These oxidation numbers are assigned using the following rules:
For example, in NaH, the H is H-; in HCl, the H is H+.
The atoms in He and N2, for example, have oxidation numbers of 0.
For example, the oxidation number of Na+ is +1; the oxidation number of N3- is -3.
The oxidation number of hydrogen is -1 in compounds containing elements that are less electronegative than hydrogen, as in CaH2.
Exceptions include OF2, since F is more electronegative than O, and BaO2, due to the structure of the peroxide ion, which is [O-O]2-.
The oxidation number of Cl is -1 in HCl, but the oxidation number of Cl is +1 in HOCl.
For example, the sum of the oxidation numbers for SO42- is -2.
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