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Justify that the reaction : 2Cu(2)+Cu(...

Justify that the reaction :
`2Cu_(2)+Cu_(2)Srarr6Cu+SO_(2)`
is a redox reaction. Identify the species oxidised// reduced , acts as oxidant and as reductant.

Text Solution

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Let us write the oxidation numbers of all the reactant and product species involved in the reaction

In this reaction, one of the reactant species undergoes decrease in oxidation number while the other unmdergoes increase in oxidation number.Therefore, it is a redox reaction in nature.
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Justify that the reaction 2Cu_(2)O_(s)+Cu_(2)S(s)rarr6Cu(s)+SO_(2)(g) a redox reaction. Identify the species oxidised // reduced. Which acts as an oxidanat and which acts as a reductant?

How does Cu_(2)O act as both oxidant and reductant ?

Justify that the reaction is a redox reaction. " "2Cu_(2)O(s)+Cu_(2)S(s) rarr 6Cu(s)+SO_(2)(g)

Oxidation is de-electronation whereas reduction is electronation. Oxidants are the substances which oxidise others and reduced themselves. On the other hand reductants are the substances which reduce others and oxidised themselves. The oxidation number of an element in a compound decides its nature to act as oxidant or reductant. Oxidation-reduction occur simultaneously and the overal chemical change is called redox reaction. Redox reactions are of three types : (i) Intermolecular erdox reactions, (ii) Auto-redox or disproportionation reaction, and (iii) Intramolecular redox reactions. Select the species which can act as oxidant and reductant both : (I) H_(2)SO_(3) , (II) H_(2)O_(2) , (III) O_(3) , (IV) HNO_(3) , (V) Cl_(2)

Cu^(2+)(aq.) does not undergo redox reaction with solution:

Oxidation and reduction process involves the transaction of electrons. Loss of electrons is oxidation and the gain of electrons is reduction. It is thus obvious that in a redox reaction, the oxidant is reduced by accepting the electrons and the reductant is oxidised by losing electrons. The reactions in which a species disproportionates into two oxidation states (lower and higher) are called disproportionation reactions. In electrochemical cells, redox reaction is involved, i.e., oxidation takes place at anode and reduction at cathode. Detennine the change in oxidation number of sulphur in H_(2)S and SO_(2) respectively in the following reaction: 2H_(2)S+SO_(2) to 2H_(2)O+3S