Half - life of the reaction :H2O2(aq)→H2Oℓ+12O2(g) is independent of initial concentration of H2O2. Volume of O2 gas after 20 minutes is 5L at 1 atm and 27∘C, and after completion of the reaction 50 L. The rate constant is :
2.30320log 5045min−1
t12 is independent of initial concentration, a, for first order reaction.
x α Vt (=5L at t=20 minutes)a α V∞(=50L at completion)2.30320logaa−x=2.30320log5045