Chemistry Rate Law and Elementary Steps

Elementary Step: A into Products

Molecularity: Unimolecular
Rate= k[A]

Elementary Step: A + A into Products (2A into Products)

Molecularity: Bimolecular
Rate= k[A]²

Elementary Step: A+B into Products

Molecularity= Bimolecular
Rate= k[A][B]

Elementary Step: A + A + B into Products (2A + B into Products)

Molecularity: Termolecular

Rate= k[A]²[B]

Elementary Step: A + B + C into Products

Molecularity: Termolecular
Rate=k[A][B][C]

Zero Order: Rate Law

Rate = k

Zero Order: Integrated Rate Law

Zero Order: Plot needed to give a straight line

[A] vs. t

Zero Order: Relationship of rate constant to the slope of straight line

Slope=-k

Zero Order: Half life

First Order: Rate Law

Rate = k[A]

First Order: Integrated Rate Law

First Order: plot needed to give straight line

ln[A] vs. t

First Order: Relationship of rate constant to the slope of straight line

Slope= -k

First Order: Half Life

Second Order: Rate Law

Rate=k[A]²

Second Order: Integrated rate law

Second Order: Plot needed to give a straight line

1/[A] vs. t

Second order: Relationship of rate constant to the slope of straight line

Second Order: Half Life