Wednesday, October 28, 2009

Rate-Constant?

How to derive rate-constant for a second order reaction when the concentration of reactants are are - (1)equal (2) unequal



Can you please derive it for me? It%26#039;s an assignment %26amp; I just have 12 hours left.Please! Thanks!



Rate-Constant?

Let



aA %26gt;%26gt; Products a second order reaction.



The law is :



- 1/a d[A] / dt = k[A]^2



- d[A] / [A]^2 = kdt



1 / [A] - 1 / [A]鎺?= k(t-t鎺?



Let



aA + bB %26gt;%26gt; products a secon order reaction



if a=b and [A] = [ B]



v = - d[A] / dt = k [A]^2



k = 1/t ( 1 / [A] - 1 / [A鎺砞



if a = b = 1 and A is not equal B



v = - d [A] / dt = k [A] [B]



Rate-Constant?

The derivation contains many symbols which cannot be drawn here, better consult a text book.

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