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How do you determine whether a reaction is first order or second order?

How do you determine whether a reaction is first order or second order?

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Answer #1

Ans. There are so many methods to determine whether the reaction is first order or second order.

first method, by knowing the half life of two set of experiment having different concentration of the starting material of following type of reaction.

nA = product

order of reaction, n = 1 + [log(t1/2)1 / (t1/2)2] / log (a2 /a1)]

a1 and a2 are concentration of A of two di.fferent experiment

Second method is ratio determing method

nA + mY = product

rate = k(A)^n (B)^m

There is required to perform at least 3 set of experiment in which 2 set of experiment have same concentration of either A or B. we determine the value of n and m. And hence we can determine the overall order of reaction.

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