A first order reaction is found to have a rate constant k 5

Last updated: 7/2/2023

A first order reaction is found to have a rate constant k 5 5 x 104 s Example 47 Find the half life of the reaction Half life for a first order reaction is Solution ty a T k 0 693 k 0 693 5 5x10 14s ty 2 T 1 26 x 10 s Show that in a first order reaction time required for completion of 99 9 is 10 times of half life t 2 of the reaction When reaction is completed 99 9 R R 0 999 R 2 303 R o log R t 2 303 t R o R 0 999 R log t 6 909 k For half life of the reaction t1 2 0 693 k 6 909 k 10 2 303 t log10 Example 4 8 Solution