00:01
To determine the reaction order with respect to each reactant and determine the general rate law, we first need to look at two experiments where two of the concentrations are staying constant and only one concentration is changing.
00:16
We'll start with experiments one and two.
00:19
We see that only a is being quadrupled from 0 .02 -4 molar to 0 .096 molar.
00:26
Concentration of b and concentration of c are staying constant.
00:29
We see that when we quadruple the rate, we end up getting a 16 -fold increase, taking a ratio of the rates, a 16 -fold increase in rate.
00:43
So when we quadruple a concentration and 16 -fold the rate, this is representative of second order, quadrupling the concentration, squaring it, gives us a 16 -fold increase in rate.
00:57
Now if we look at experiments 1 and 4, we see that.
01:02
That the a concentration is being cut in half.
01:05
If it's second order with respect to a, cutting the concentration in half, should result in one -fourth the rate.
01:14
And then we also see b being doubled.
01:19
It's going from 0 .085 to 0 .170...