The concentration of bromine radical is — Chemical Kinetics Chemistry Question

💡 Solution & Explanation

Applying the steady-state approximation to [Br] and [H] radicals, and adding their derivatives (d[Br]/dt + d[H]/dt = 0), all intermediate propagation terms cancel out, leaving 2K1[Br2] - 2K5[Br]^2 = 0. Solving for [Br] yields [Br] = (K1/K5)^1/2 [Br2]^1/2. Therefore, correct answer is D.