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Which of these redox reactions is spontaneous as written? a. Ni + Zn2+ → Ni2+ + ZnB. Mg + Li+ → Mg2+ + LiC. Cu + Au3+ → Cu2+ + AuD. Zn + Ca2+ → Zn2+ + Ca?

Which of these redox reactions is spontaneous as written? a. Ni + Zn2+ → Ni2+ + ZnB. Mg + Li+ → Mg2+ + LiC. Cu + Au3+ → Cu2+ + AuD. Zn + Ca2+ → Zn2+ + Ca?
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2 votes
Which of these redox reactions is spontaneous as written?

a. Ni + Zn2+ → Ni2+ + ZnB. Mg + Li+ → Mg2+ + LiC. Cu + Au3+ → Cu2+ + AuD. Zn + Ca2+ → Zn2+ + Ca?

User Malek Ben El Ouafi
by
7.4k points

1 Answer

4 votes

D. Zn + Ca²⁺ → Zn²⁺ + Ca

Because Ca is more active metal (from the electrochemical series).

User Nick Sharp
by
7.3k points
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