anonymous
  • anonymous
Which equation represents the reduction half-reaction for this redox equation? Mg + CuSO4 MgSO4 + Cu A. Cu Cu B. Cu + 2e- Cu C. Cu Cu + 2e- D. Cu + 3e- Cu
Chemistry
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
@Abhisar
Abhisar
  • Abhisar
Ok, what do you think it should be? Any Idea?
anonymous
  • anonymous
honestly, not a clue... This is my first time taking chemistry.. & i am LOST.

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Abhisar
  • Abhisar
Fine, do you know what defines a reduction reaction ?
Abhisar
  • Abhisar
Yes/No?
anonymous
  • anonymous
no.. ? but i can google it. lol
Abhisar
  • Abhisar
Ok, reduction reaction is when any species gains electron. The reaction which you have been given can be written as follows:- \(\sf Mg + Cu^{+2}+SO4^{-2} \rightarrow Mg^{+2}+SO4^{-2} + Cu\)
Abhisar
  • Abhisar
Now tell which species on the reactant side has gained electron?
Abhisar
  • Abhisar
Which one has =+ve charge on the left hand side but is neutral on right hand side?
anonymous
  • anonymous
cu?
Abhisar
  • Abhisar
Yes, so we can say that the reduction half is :- \(\sf Cu^{2+} +2e^- \rightarrow Cu\) Notice since it had 2+ charge before and neutral after that's why it must have gained 2 electrons.
anonymous
  • anonymous
so the answer is B?
Abhisar
  • Abhisar
Isn't that obvious ? c:
anonymous
  • anonymous
that's what i chose. thanks!!
Abhisar
  • Abhisar
You're welcome c:

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