00:01
The best way to determine the order of the reaction is to take the data and plot the concentration as a function of time, the natural log of the concentration is a function of time, and one over the concentration as a function of time, whichever one gives you the best straight line, that will determine the order of the reaction.
00:21
If one over the concentration gave the best straight line, it would be second order.
00:25
If concentration is a function of time gave the best straight line, it would be zero order.
00:33
And if natural log of the concentration gave the best straight line, it would be first order.
00:38
To determine the best straight line, they all look pretty straight.
00:43
We reference the r squared value.
00:46
If you use excel, once you've prepared the graph, you can right -click on the data and add a trend line.
00:52
Once the trend line's been added, you can modify the options for the trend line.
00:56
To show the equation of the line and the r squared value.
01:00
The r squared value closest to 1 gives you the best straight line.
01:04
This is closer to 1 than these 2, so it's first order...