00:01
To determine the instantaneous rate of the reaction at a particular time, we first need to know how to express the rate of the reaction in terms of the change in concentration of hydrogen peroxide, which is what has been plotted.
00:16
The rate of the reaction, because hydrogen peroxide is a reactant, will be equal to negative, negative because it's a reactant, one over its coefficient, multiplied by its change in concentration over a change in time.
00:31
This will just simply be the slope of a tangent right at the time that we're considering.
00:38
We could also express the rate of the reaction in terms of the change in concentration of this gas.
00:44
We can't with the liquid because we exclude liquids.
00:47
They don't have changing concentrations that are significant.
00:51
So because it's a product, it'll now be positive 1 over its coefficient of 1, multiplied by the change in concentration of 02 over change in time.
00:59
So here's our graph.
01:01
It looks something like this...