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Question
Describe the graphical representation of first order reaction.
Solution
Rate constant for first order reaction is,
kt = ln `((["A"_0])/(["A"]))`
kt = In [A0] – In [A]
In [A] = In [A0] – kt
y = c + mx
If we follow the reaction by measuring the concentration of the reactants at regular time intervals ‘t’, a plot of ln [A] against ‘t’ yields a straight line with a negative slope. From this, the rate constant is calculated.
A plot of ln [A] Vs t for a first order reaction, \[\ce{A -> product}\] with initial concentration of [A] = 1.00 M and k = 2.5 × 10−2 min−1
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