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Question
Is it essential that oxidation and reduction must occur side by side in a chemical reaction? Explain.
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Solution
In a chemical reaction, if one substance is oxidized, the other substance must necessarily be reduced because the electrons lost during oxidation are simultaneously gained during reduction or vice-versa.
Hence, both the reactions must take place side by side.
Example:
When zinc reacts with copper sulphate solution to form zinc sulphate and copper, electrons lost by Zn (oxidation) are gained by Cu (reduction).
Reaction:
\(CuSO_4 + Zn → ZnSO_4 + Cu\)
Ionic reaction:
\( Zn + {Cu}{^2}^+ → Cu + Zn^2+\)
In a chemical reaction, if one substance is oxidized, the other substance must necessarily be reduced because the electrons lost during oxidation are simultaneously gained during reduction or vice-versa.
Hence, both the reactions must take place side by side.
Example:
When zinc reacts with copper sulphate solution to form zinc sulphate and copper, electrons lost by Zn (oxidation) are gained by Cu (reduction).
Reaction:
\(CuSO_4 + Zn → ZnSO_4 + Cu\)
Ionic reaction:
\( Zn + {Cu}{^2}^+ → Cu + Zn^2+\)
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