Explain graphical method to determine the order of reaction.Answer it in detail.
Answers
in zero order reaction concentration versus time graph has negative slope with positive Intercept
rate of reaction is constant rate vs concentration graph is constant
in first order reaction log of concentration versus time graph has negative slope with positive Intercept
in second order reaction 1 / concentration versus time graph has positive slope with zero Intercept
in third order reaction 1/ concentration ^2 versus time graph has positive slope and zero Intercept
Answer:
This method can be used when there is only one reactant.
If the plot of log [A] vs t is a straight line, the reaction follows first-order .
If the plot of 1/[A] vs t is a straight line, the reaction follows second order.
If the plot of 1/[A]2 is a straight line , the reaction follows third order.
Generally, for a reaction of nth order, a graph of 1/[A]n-1 vs t must be a straight line.
Here [A] is the concentration of reactant at any given time of the reaction (other t =0). [A] = (a-x) where a is the initial concentration and x is the extent of reaction at time t.