Question

Explain graphical method to determine the order of reaction.Answer it in detail.

Answer 1

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 2

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.