00:01
If we have a chemical reaction where the initial rate of the reaction doubles as the concentration is quadrupled, we can figure out the order by recognizing that the rate is equal to k multiplied by the concentration raised to some power.
00:22
So let's say that k is one, and we start out with a concentration of one, then it doesn't matter what the order is so long as it's not zero order.
00:33
The rate will be equal to 1.
00:36
So if we want the rate to double, become 2, when k is 1, when we quadruple the concentration, what does x have to be, so that 4, raised to the order, multiplied by 1, gives us 2.
00:58
Well, x has to be 1ā2.
01:02
1ā2 means we'll take the square root of 2.
01:04
I'm sorry, of four to get two.
01:08
So the order of the reaction is one -half...