How can I calculate rate of reaction? Do I need to draw a graph of absorbtion against time?

Question

I have the equation rate=k(Monomer)2 but i don't know what is k and what is (monomer)2

I have to draw 3 of them but I don't know what is k? and I only have absorbance or concentration and I have to plot concentration against rate but I don't know what is the rate

Answer 1

u gave me the definition of a second order reaction. the rate of a reaction is equal to k(a constant) times the molarity of that substance to a certain power. if its first order it will be
Rate = k[A]. if its second order it will be rate=k[A]^2.

to calculate rate of reaction they need to give u what order it is, the k and the molarity. if u give me a problem, ill help u. u can contact me.

Answer 2

To calculate the rate at a certain concentration you will need to know the rate constant k.

k is easy enough to find. You have shown a second order rate equation of rate =k[monomer]2

You can intergrate this to: 1/[monomer]=1/[monomer]o +kt

if you plot 1/[monomer] v's time you should get a straight line with a slope of k and an intercept of 1/[monomer]0

Now you have the rate constant and can find the reaction rate at any concentation of monomer

Answer 3

k is a constant
[A]^2 means its a second order reaction

Plot the graph of (rate)^0.5 [y-axis] against [A] [x-axis]
(or rate against [A]^2)

The gradient will be k and it will be a straight line