Homework Answers
Solution:- To find out the order of the reaction, we make plots for the concentrations vs time.
If a graph is plotted by taking concentration along y-axis and time along x-axis and gives a straight line then reaction is zero order and k = -slope.
If ln of concentration vs time gives straight line then reaction is first order and k = -slope.
And, if we make a plot of 1/concentration vs time and it gives a straight line then reaction is second order and k = slope.
We try the plots and find that ln[concentration] vs time gives the straight line. The graph is as shown below in the image.
we know that, k = -slope
So, the reaction is first order and the rate constant is
.
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