Half life of zero order reaction is 1 hour. If initial concentration of reactant is 2.0 mol L ⁻¹ , find the time required to decrease concentration from 0.50 to 0.25 mol L ⁻¹

Step-by-step solution

For a zero order reaction, the half-life is given by t_ 1/2 = [A]₀ 2k Substituting the given values: 1 = 2.0 2k k = 1.0 mol L ⁻¹ hour ⁻¹ The integrated rate equation for a zero order reaction is [A]_t = [A]₀ - kt For the concentration to decrease from 0.50 mol L ⁻¹ to 0.25 mol L ⁻¹ , the time required is: t = [A]₁ - [A]₂ k t = 0.50 - 0.25 1.0 = 0.25 hour