00:01
So we have given a reaction that is a plus 4b which gives 2c.
00:06
Okay.
00:08
So here on left side we have reactants, on right side we have products and we have to find out the rate of reaction with respect to each of them.
00:17
Okay.
00:18
With respect to reactants and products respectively.
00:21
Now during a reaction the reactants are being consumed and as soon as they are consumed so as soon as we get products.
00:31
Okay.
00:31
So products are being produced.
00:34
Okay.
00:35
So now for a with respect to a we can write that delta this is concentration of a that is change in concentration of reactant a with respect to change in time delta t and now since the reactants are being consumed so that's why we put negative sign.
01:04
Keep in mind that this negative sign has nothing to be considered in the calculation.
01:12
Okay.
01:12
Don't consider this minus sign in your calculation.
01:16
This is only a symbolical representation here that the reactants are being consumed and there is decrease in the concentration of the reactant with increasing time.
01:31
Okay.
01:32
Now that will be equal to with respect to b so this is delta concentration of b divided by delta t.
01:47
Okay.
01:48
So that is the change in concentration of b with respect to change in time.
01:54
Okay.
01:55
And now we have this 4 here so that is the stoichiometric coefficient.
02:01
Stoichiometric coefficient is considered as reciprocal always and since this is also a reactant so the concentrations are decreasing with increasing time so we will put minus sign again.
02:15
Now for c so that is the product.
02:17
So delta change in concentration of c product with respect to change in time and now this is product so the concentration is increasing with time.
02:34
Okay...