Chemical Kinetics

Question 1

The slowest step in a reaction is known as the…?

Answer 1

Rate-determining step

-Rate of rxn is only as fast as the RDS

Question 2

The idea that the rate of a rxn is proportional to the # of collisions per sec. btwn reacting molecules is known as ?

Answer 2

Collision theory of chemical kinetics
-Not all collisions result in rxn
rate = Z x f (z= total # of collisions occurring per sec; f= fraction of collisions that are effective)

Question 3

A measure of how often molecules collide in a certain rxn is known as ?

Answer 3

Frequency factor/attempt frequency

Question 4

What is the diff btwn. homogenous catalysis & heterogeneous catalysis ?

Answer 4

homo happens in same phase while hetero happens in a distinct phase (referring to catalyst)

Question 5

What is the expression of rate in units ?

Answer 5

M/s

Question 6

What factors are capable of changing a zero order rxn ?

Answer 6

Temp & catalyst