In which of the following electrochemical cell the overall cell reaction is: Zn(s) + H2SO4 (aq) → ZnSO4 (aq) + H2 (g)

Question

In which of the following electrochemical cell the overall cell reaction is: Zn(s) + H2SO4 (aq) → ZnSO4 (aq) + H2 (g) (A) Zn | H2SO4 (aq) | H2 (g) | Pt (B) Zn | ZnSO4 (aq) | H2 (g) | Pt (C) Zn | ZnSO4 (aq) | H2SO4 (aq) | H2 (g) | Pt (D) Zn | ZnSO4 (aq) || H2SO4 (aq) | H2 (g) | Pt

Tardigrade Admin · Accepted Answer

For the cell: Zn | ZnSO4 (aq) || H2SO4 (aq) H2 (g) | Pt LHE reaction: Z n → Zn2+ + 2e RHE reaction: 2H+ + 2e → H2 Net reaction: Zn + 2H+ → Zn2+ + H2 or Zn (s) + H2SO4 (aq) → ZnSO4 (aq) + H2 (g)

Q. In which of the following electrochemical cell the overall cell reaction is:
$Z n (s) + H_{2} S O_{4} (a q) \to Z n S O_{4} (a q) + H_{2} (g)$

$Z n ∣ H_{2} S O_{4} (a q) ∣ H_{2} (g) ∣ Pt$

$Z n ∣ Z n S O_{4} (a q) ∣ H_{2} (g) ∣ Pt$

$Z n ∣ Z n S O_{4} (a q) ∣ H_{2} S O_{4} (a q) ∣ H_{2} (g) ∣ Pt$

$Z n ∣ Z n S O_{4} (a q) ∣∣ H_{2} S O_{4} (a q) ∣ H_{2} (g) ∣ Pt$

For the cell: $Z n ∣ Z n S O_{4} (a q) ∣∣ H_{2} S O_{4} (a q) H_{2} (g) ∣ Pt$
LHE reaction: $Z n \to Z n^{2 +} + 2 e$
RHE reaction: $2 H^{+} + 2 e \to H_{2}$
Net reaction: $Z n + 2 H^{+} \to Z n^{2 +} + H_{2}$
or $Z n (s) + H_{2} S O_{4} (a q) \to Z n S O_{4} (a q) + H_{2} (g)$

Q. In which of the following electrochemical cell the overall cell reaction is: Zn(s)+H2​SO4​(aq)→ZnSO4​(aq)+H2​(g)

Zn∣H2​SO4​(aq)∣H2​(g)∣Pt

Zn∣ZnSO4​(aq)∣H2​(g)∣Pt

Zn∣ZnSO4​(aq)∣H2​SO4​(aq)∣H2​(g)∣Pt

Zn∣ZnSO4​(aq)∣∣H2​SO4​(aq)∣H2​(g)∣Pt