What Are the Two Half Reactions That Show How Many $\rarr$

question 82

Multiple Choice

What are the two half reactions that show how many electrons are gained or lost by each species in the reaction:
Ni²⁺(aq) + Mg(s) $\rarr$ Ni(s) + Mg²⁺(aq) ?

• A)Ni 2+ (aq)+ e - \(\rarr\) Ni(s)and Mg(s)\(\rarr\) Mg 2+ (aq)+ e -
• B)Ni 2+ (aq)+ 2 e - \(\rarr\) Ni(s)and Mg(s) \(\rarr\)Mg 2+ (aq)+ 2 e -
• C)Ni 2+ (aq) \(\rarr\) Ni(s)+ 2 e - and Mg(s)+ 2 e - \(\rarr\)Mg 2+ (aq)
• D)Ni 2+ (aq) \(\rarr\)Ni(s)+ e - and Mg(s)+ e - \(\rarr\) Mg 2+ (aq)
• E)Ni 2+ (aq)+ 2 e - \(\rarr\) Ni(s)and Mg(s)+ 2 e - \(\rarr\) Mg 2+ (aq)

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