ap chem unit 5

factors affecting the rate of a reaction

1. concentration of the reactants

2. particle size/surface area

3. temperature

4. catalyst

k =

|slope| of the straight line

if time v. concentration is a straight line, the reaction is

0 order with respect to that reactant

if time v. ln[concentration] is a straight line, the reaction is

1st order with respect to that reactant

If time v. 1/[concentration] is a straight line, the reaction order is

2nd order with respect to that reactant

when two molecules collide, they have to collide with

1. sufficient energy

2. correct orientation

on a 1/T v. lnk graph, slope =

— E_a/R

the reaction intermediate is

produced in an early step and used up in a later step

the catalyst is

present at both the beginning and the end, but never consumed

the rate for any reaction is determined by the __ step in the mechanism

slowest