Chemical Kinetics Question 300
Question: A reaction which is of first order w.r.t. reactant A, has a rate constant 6 $ {{\min }^{-1}} $ . If we start with $ [ A ]=0.5mol{L^{-1}} $ , when would [A] reach the value of $ 0.05mol,{L^{-1}} $
Options:
A) 0.384 min
B) 0.15 min
C) 3 min
D) 3.84 min
Show Answer
Answer:
Correct Answer: A
Solution:
[a] $ t=\frac{2.303}{k}\log \frac{a}{a-x} $
$ =\frac{2.303}{6}\log \frac{0.5}{0.05}=0.384,\min . $
