Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) A substance 'A' decomposes in solution by 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 of ‘A’ After 8 hrs the concentration of 'A' in flask I become 0.25 M. What will be the time for concentration of ‘A’ in flask II to become 0.3 M? - Sarthaks eConnect

A substance 'A' decomposes in solution by 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 of ‘A’ After 8 hrs the concentration of 'A' in flask I become 0.25 M. What will be the time for concentration of ‘A’ in flask II to become 0.3 M?

A substance 'A' decomposes in solution by 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 of ‘A’ After 8 hrs the concentration of 'A' in flask I become 0.25 M. What will be the time for concentration of ‘A’ in flask II to become 0.3 M?

A.

2.0 hrs

B.

8.0 hrs

C.

4.0 hrs

D.

6.0 hrs

Solution

0 votes

Best answer

From the data of I flash `(3/4)^(th)` of A disappears in 8 hrs , hence `1/2` of A will disappear in 4 hrs.