The aquation of tris(1,10-phenanthroline) iron(II) in acid solution takes place according to the equation: Fe(phen) ₃²⁺ + 3 H₃O⁺ + 3 H₂O → Fe(H₂O) ₆²⁺ + 3 phenH⁺
If the activation energy,E_a,is 126 kJ/mol and the rate constant at 30°C is 9.8 × 10^-3 min^-1,what is the frequency factor,A?

Question

Quizplus · Accepted Answer

The frequency factor, A, can be calculated using the Arrhenius equation: k = A * e^(-Ea/RT). Rearranging for A gives A = k / e^(-Ea/RT). Substituting the given values (Ea = 126,000 J/mol, k = 9.8 × 10^-3 min^-1, R = 8.314 J/mol·K, T = 303 K), we find A ≈ 5 × 10^19 min^-1.

The Aquation of Tris(1,10-Phenanthroline)iron(II)in Acid Solution Takes Place According to the Equation