Electrode Potentials Question

JEE Mains Tutorials › Physical Chemistry questions › Electrode Potentials Question

Which of the following statements is correct if
Standard reduction potentials of Cu and Sn are 0.337V and -0.136V resp. (both from +2 charge)

a) Cu²⁺ ions can be reduced by H₂(g)
b) Cu can be oxidised by H⁺
c) Sn²⁺ ions can be oxidised by H₂(g)
d) Cu can reduce Sn²⁺

I am confused between reduction/oxidation of ions/metals by H2 or H+. I don't have any idea of correctly employing the given reduction potential values in each case. I tried and deduced that c) and d) must be incorrect. No idea about a) and b)

Please provide me clear explanation of this.
Thanks in advance.

#Chemistry #Physical Chemistry

UP 0 DOWN 0 0 2
Post on FacebookPost anonymously?

2 Answers

qwerty ·2010-12-28 08:14:10

Cu²⁺+2e^- â†’ Cu, Î”G₁

2H⁺+2e^- â†’ H₂ ,Î”G₂

reaction 1 - 2 gives

Cu²⁺ + H₂ â†’ Cu + 2H⁺,Î”G = Î”G₁-Î”G₂

if Î”G < 0 , reaction is favourable

UP 0 DOWN 0
Post on FacebookPost anonymously?

swordfish ·2010-12-28 12:08:21

Thanks!

UP 0 DOWN 0
Post on FacebookPost anonymously?

Your Answer

Basic Integral Calculus Operators Symbols Matrix Cases

√ √ || {} [] () → ~ ^ x x x → → ln log lg lim lim cos sin tan cot arcsin arccos arctan

∫ ∫ ∫ ∫ ∫ ∬ ∬ ∬ ∬ ∬ ∭ ∭ ∭ ∭ ∭ ⨌ ⨌ ⨌ ⨌ ⨌

∑ ∑ ∑ ∑ ∑ ∮ ∮ ∮ ∮ ∮ ∏ ∏ ∏ ∏ ∏ ∐ ∐ ∐ ∐ ∐

+ - × ÷ ± ∓ = ∪ ∩ ≠ ∼ ≈ ∅ ∀ ∃ ∈ ∋ ∝ ≤ ≥ ≃ ≅ ≡ < > ≪ ≫ ⊂ ∉ ⊃ ⊆ ⊇ ⇒ ⇐ ⇔ ⇒ ⇐ ⇔ ⇑ ⇓ ⇕ → ← ↔ → ← ↔ ↑ ↓ ↕ ↖ ↗ ↘ ↙ ↪ ↩ ⇀ ↼ ⇁ ↽

° ∂ ∞ α β γ δ θ λ μ ν ξ π ρ σ φ ω ε ƒ κ τ υ Γ Δ Λ Σ Π Ω

Close [X]

Electrode Potentials Question

2 Answers

Your Answer

Add Image

Similar Questions