Question

A certain first order reaction is half completed in 46 min. Calculate the rate constant and also time taken for 75% completing of the reaction

Answer 1

Answer:

19.099

Explanation:

ln At/A0= -kt

if the rxn is completed half then At is A0/2

so the expression is ln1/2= -0.693

then k= .693/46 min

Now the rxn is completed 75%

Hence At will be 3Ao/4

As the same proccess done above

By putting tha vale of k

the answer will be 19.099