A flask contains a mixture of compounds A B Both compounds decomposed by 1st order kinetics The half lives - Chemistry - Chemical Kinetics and Nuclear Chemistry

Question

A flask contains a mixture of compounds A&B Both compounds
decomposed by 1st order kinetics The half lives are 54 minutes for
A &18 minutes for B If the concentrations of A & B are
equal initially,how long will it take for the concentration of A to
be 4 times that of B

Shruti Srivastava · Accepted Answer

Dear students,

Half life of A is 54 minutes and that of B is 18 minutes
if initial concentration of both A & B are equalso, A→A2 54 minutesB→B2 in 18 minutesB2→B4 in another 18 minute or in 36 minutes from startB4→B8 in another 18 minute or in 54 minutes from startnow after 54 minutes the concentration of A i
e A2is 4 times that of concentarion of B i
e
 B8So the time reuired is 54 minutes when concentration of A is 4 times that of conc
 of B Regards

A flask contains a mixture of compounds A&B .Both compounds decomposed by 1st order kinetics.The half lives are 54 minutes for A &18 minutes for B.If the concentrations of A & B are equal initially,how long will it take for the concentration of A to be 4 times that of B.