Question
Chemistry Question on Chemical Kinetics
A substance A decomposes in solution following the first order kinetics. Flask I contains 1 L of 1 M solution of A and flask II contains 100 mL of 0.6 M solution. After 8 hr the concentration of A what will be the timefor concentration of A in flask II to become 0.3 M
A
0.4 hr
B
2.4 hr
C
4 .0 hr
D
unpredictable as rate constant is not given
Answer
4 .0 hr
Explanation
Solution
From the date of 1st flask, 3/4th of A disappears in 8 hrs.1/2 of A will disappear in 4 hrs