wat r v suppose 2 follow while identifing which element is gettin oxidised or reduced- the electropositivity orelectronegetivity /addition and reduction of oxygen or hydrogen

Asked by Shivaani M | 27th Jul, 2010, 12:00: AM

Expert Answer:

Oxidation is a process f in which an element losses one oe more electrons.
Reducction is a process in which an element gains one or more electrons.
both processes go on simultaneously in a chemical reaction.
 
Zn(s)  +  CuSO4(aq) ------------->  ZnSO4 (aq) + Cu (s)
here Zn -------> Zn2+ +2e-
2 electrons are lost by zinc atom which then combines with sulphate ion.        Cu2+ + 2e- ----------> Cu
copper ion gains two electrons and becomes neutral.

Answered by  | 28th Jul, 2010, 04:23: PM

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