00:01
Approximation is a method used in chemical kinetics to approximate the concentration of an intermediary species, in this case b.
00:22
And it assumes, which allows us to do a lot of things, that the rate of formation, so let's say k1, is equal to the rate of consumption, k2, leading to a constant concentration, we'll put that on the next line, of the intermediary.
00:59
So let's look at our equation again.
01:06
We have a goes to b, but also goes back, and then b goes to c.
01:17
So if we have our k2 is way greater than k minus 1, we can kind of say that k minus 1 then is negligible.
01:37
So that would be more like it going a straight to b straight to c.
01:47
Because k1 and k2 are about equal.
01:51
And then if k1, k minus 1 is really tiny, we're not going to really see any change back to a.
02:01
So if we look at this graphically, where we have time of a reaction and then concentration.
02:14
I should write this b.
02:18
So time, we have no b.
02:20
B, we see it being converted into a, and then we see it being converted into c...