Submissions are not permanently recorded In your lab you are studying the kineti
ID: 695609 • Letter: S
Question
Submissions are not permanently recorded In your lab you are studying the kinetics of the degradation of a pain killer in the human liver. You are monitoring the concentration of the pain killer over a period of time. The initial concentration of the pain killer in your experiment was 1.99 M After 20.86 hours the concentration was found to be 0.9950 M. In another 10.43 If another experiment were set up where the initial concentration of the pain killer was 0.361 M, how long would it take for the pain killer concentration to reach 0.0111 M? 3624h You have entered that answer before Incorrect. Submissions to practice problems are not Tries 3/45 Previous Tries permanently recorded.Explanation / Answer
Answer: THIS IS A FIRST ORDER REACTION AS THE REAACTION IS CONCENTRATION DEPENDENT.
For first order reaction, half -life period:
t1/2 = 0.693/k
20.86 = 0.693/k
k= 0.0332 (Rate constant)
Rate law equation:
Log (A0/A ) = kt/2.303 where A0 = Initial concentration & A = Final concentration
log (0.361/0.0111) = 0.0332 x t/2.303
log (32.52) = 0.0144 x t
1.512/0.0144 = t
t= 105 hours