Question No.3: Hydrogen peroxide reacts with thiosulfate ion in slightly acidic solution as follows: H202 +28203- + 2H+ + 2H2O+S402- A + 2B + 2C 2R + S This reaction rate is independent of the hydrogen-ion concentration in the pH range 4 to 6. The following data were obtained at 25C and pH 5.0. Initial concentrations: [H202] = 0.036 mol L'; [S203 2:] = 0.02040 mol L-' 16 Time/min 36 43 52 10.30 5.18 4.16 [S203 2-1/10-3 mol L- 3.13 The reaction is first-order with respect to both H2O2 and S203 2- (second-order overall) a. Derive the integrated rate law for the second-order reaction of the above conditions. b. Determine the specific rate constant, ko at 25C. c. Calculate the time needed to achieve 25% conversion of A