Imagine2046 Imagine2046

01-08-2018
Chemistry

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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?

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SvetkaChem SvetkaChem

01-08-2018

D. Zn + Ca²⁺ → Zn²⁺ + Ca

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

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