Answer to Question #251610 in Chemistry for xcby

Question

write the corresponding half reaction for

(a)  Ca(s) + Cu(NO3)2(aq) → Cu(s) + Ca(NO3)2(aq)

(b)  Zn(s) + Ni²⁺ → Ni(s) + Zn²⁺

Answer 1

Solution:

(a) Ca(s) + Cu(NO₃)₂(aq) → Cu(s) + Ca(NO₃)₂(aq)

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Ca(s) − 2e- → Ca²⁺(aq) (oxidation half-reaction)

Cu²⁺(aq) + 2e- → Cu(s) (reduction half-reaction)

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Ca(s) + Cu²⁺(aq) → Ca²⁺(aq) + Cu(s)

(b) Zn(s) + Ni²⁺ → Ni(s) + Zn²⁺

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Zn(s) − 2e- → Zn²⁺ (oxidation half-reaction)

Ni²⁺ + 2e- → Ni(s) (reduction half-reaction)

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Zn(s) + Ni²⁺ → Zn²⁺ + Ni(s)