2 First Order
Reactions
Rationalised 2023-24
73
Chemical Kinetics
Rearranging this equation
[
]
[
]0
lnR
R
kt
= −
or 
 
 
1 lnR0
R
k
t
(3 10)
At time t1 from equation (3 8)
*ln[R]1 = – kt1 + *ln[R]0
(3 11)
At time t2
ln[R]2 = – kt2 + ln[R]0
(3