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CBSE Class 12-science Answered

give the derivation of zero order.
Asked by | 13 May, 2013, 10:35: PM
answered-by-expert Expert Answer
For zero order reaction, the rate law is :
 
Rate=?d[A]/d k[A]constant
 
 
Lets take a general reaction:
 
A —————-> P
 
 
If it is a reaction of zero order then we can write,
Rate = -d [A] / dt = k [A] 0 = k
 
or, d [A] = – k dt
 
Integrating both sides, we will get:
[A] = – kt + I
Where I is a constant of integration
At, t = 0, [A] = [A] 0
Therefore, [A] 0 = I
Substituting this value of I in equation 1, we will get:
[A] = -kt + [A] 0
kt = [A] 0 – [A]
k = 1 / t ([A] 0 – [A])
Hence, the Integrated Rate Expression of Zero Order Reaction is
 
1 / t ([A] 0 – [A])
Answered by | 14 May, 2013, 10:49: AM
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