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FIJI NATIONAL UNIVERSITYCHM403SEM: Foundation Chemistry IIShort Test 2 Assignment – Semester 2, 2021Ronita Vikashni Kumar2018006780
1.Reduction-involves a half-reaction in which a chemical speciesdecreases itsoxidation number, usually by gainingelectrons. Theother half of the reaction involves oxidation, in which electrons arelost. Together, reduction and oxidation form redox reactions(reduction-oxidation = redox).Example:The H+ions, with an oxidation number of +1, are reducedto H2, with an oxidation number of 0, in the reaction:Zn(s) + 2H+(aq)Zn2+(aq) + H2(g)Oxidationoccurs when an atom, molecule, or ion loses one or moreelectrons in a chemical reaction. When oxidation occurs, the oxidationstate of the chemical species increases. Oxidation doesn't necessarilyinvolve oxygen! Originally, the term was used when oxygen causedelectron loss in a reaction.Example:A reaction is that between hydrogen and fluorine gas toformhydrofluoric acid:H2+ F22 HF

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Term
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Redox, Oxidizing agent, Fiji National University, Foundation Chemistry II, Ronita Vikashni Kumar

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