AP CHEM Kinetics

Linear graph for zero order

[A] vs t

Linear graph for first order

ln [A] vs t

Linear graph for second order

1/[A] vs t

Units of k and rate for 0 reaction

M/S or M x S^-1

Units of k and rate for 1st reaction

1/s or s^-1; M/S or M x S^-1

Units of k and rate for 2nd reaction

1/M x S or M-1 x s^-1; M/S

How do catalysts work

Catalysts work in one of two ways:

• alter the rate of reaction by changing the number of effective collisions

altering the chemical pathway to one that requires less energy (particularly for the rate determining step). 

Integrated rate law equation first order

ln[A]t-ln[A]0=-kt

Integrated law equation second order

1/[A]t= kt + 1/[A]0

Integrated rate law zero order

[A]t=-kt+[A]0