The standard reduction potentials of Zn and Ag in water at 298 K are, Zn ^ +2 +2 e ^ - Zn…
Chemistry · NEET · NTA Exams — Electrochemistry
The standard reduction potentials of Zn and Ag in water at 298 K are, \(\mathrm{Zn}^{+2}+2 \mathbf{e}^{-} \rightarrow \mathrm{Zn}_{i} \mathrm{E}^{\mathrm{a}}=-0.76 \mathrm{~V} \text { and } \mathrm{Ag}^{+}+\mathbf{e}^{-} \rightarrow \mathrm{Ag}\) ; Eo = + 0.80 V. Which of the following reactions take place?
- Zn+2(aq) + 2Ag(s) → 2Ag+(aq) + Zn(s)
- Zn(s) + 2Ag+(aq) → Zn2+(aq) + 2Ag(s)
- Zn+2(aq) + Ag+(aq) → Zn(s) + Ag(s)
- Zn(s) + Ag(s) → Zn+2(aq) + Ag+(aq)
Answer
(B) Zn(s) + 2Ag + (aq) → Zn 2 + (aq) + 2Ag(s)
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