The standard oxidation potentials of Zn and Ag in water at 25°C are Zn(s) → Zn2+ + 2e [E° = 0.76 V] Ag(s) → Ag+ + e [E° = -0.80 V] Which of the following reactions actually takes place?

Question

The standard oxidation potentials of Zn and Ag in water at 25°C are Zn(s) → Zn2+ + 2e [E° = 0.76 V] Ag(s) → Ag+ + e [E° = -0.80 V] Which of the following reactions actually takes place? (A) Zn(r) + 2Ag+ (aq) → Zn2+ + 2Ag(s) (B) Zn2+ + 2Ag+ (s) → 2Ag+ (aq) + Zn(s) (C) Zn(s) + 2Ag(s) → Zn2+ (aq) + Ag+ (s) (D) Zn2+ (aq) + Ag+ (aq) → Zn(s) + Ag(s)

Tardigrade Admin · Accepted Answer

Zn(s) + 2Ag+ → 2Ag + Zn2+ E° = 0.76 + 0.8 = 1.56 V

Q. The standard oxidation potentials of $Z n$ and $A g$ in water at $25° C$ are
$Z n (s) \to Z n^{2 +} + 2 e [E ° = 0.76 V]$
$A g (s) \to A g + + e [E^{°} = - 0.80 V]$
Which of the following reactions actually takes place?

$Z n (r) + 2 A g^{+} (a q) \to Z n^{2 +} + 2 A g (s)$

$Z n^{2 +} + 2 A g^{+} (s) \to 2 A g^{+} (a q) + Z n (s)$

$Z n (s) + 2 A g (s) \to Z n^{2 +} (a q) + A g^{+} (s)$

$Z n^{2 +} (a q) + A g^{+} (a q) \to Z n (s) + A g (s)$

$Z n (s) + 2 A g^{+} \to 2 A g + Z n^{2 +}$
$E^{°} = 0.76 + 0.8 = 1.56 V$

Q. The standard oxidation potentials of Zn and Ag in water at 25°C are Zn(s)→Zn2++2e[E°=0.76V] Ag(s)→Ag++e[E°=−0.80V] Which of the following reactions actually takes place?

Zn(r)+2Ag+(aq)→Zn2++2Ag(s)

Zn2++2Ag+(s)→2Ag+(aq)+Zn(s)

Zn(s)+2Ag(s)→Zn2+(aq)+Ag+(s)

Zn2+(aq)+Ag+(aq)→Zn(s)+Ag(s)