Question #f875f
1 Answer
Feb 12, 2017
We know that the equation of rate constant for 1st oder reaction is as follows
#color(blue)(k=1/tln(C_0/C_t)......[1])#
where
For 50% completion of the reaction time is 30 min
so for
So inserting these in [1] we get
#k=1/30ln2......[2]#
Let the reaction becomes 90% complete in
So
The equation [1] then becomes
#k=1/Tln(10).........[3]#
Comparing [2] and [3] we get
#1/30ln2=1/Tln(10)#
#=>T=(30ln10)/ln2~~99.65 min#