Question

Calculate the emf of the following cell at 25°C: Zn (s) | Zn²⁺ (0.1 M) || H⁺ (0.01 M) | H₂ (g) (1 bar), Pt (s) [Given: E°(Zn²⁺/Zn) = – 0.76 V, E°(H⁺/H₂) = 0.00 V, log 10 = 1]

State Kohlrausch law of independent migration of ions. Why does the conductivity of a solution decrease with dilution?

Four half reactions I to IV are shown below : I. 2Cl⁻ → Cl₂ + 2e⁻, II. 4OH⁻ → O₂ + 2H₂O + 2e⁻, III. Na⁺ + e⁻ → Na, IV. 2H⁺ + 2e⁻ → H₂. Which two of these reactions are most likely to occur when concentrated brine is electrolysed ?

The products of the electrolysis of aqueous NaCl are :