Kinetics (I and II)

Question 1

How does increase in concentration affect rate of reaction?

Answer 1

High conc= more particles in a particular volume

Increases the frequency of successful collisions per second

Question 2

How does increase in surface area increase rate of the reaction?

Answer 2

Larger surface area means more reactants can attach and react to the surface

Question 3

X and Y axis of MaxWell Boltzmann graph

Answer 3

X axis- energy

Y axis- fraction of molecules with energy, E

Question 4

Define steric hinderance

Answer 4

Where atoms are too large and they prevent attaching molecules by getting in the way

Question 5

Define activation energy

Answer 5

Min energy needed for particles to collide in order for them to react together

Question 6

Define collision theory

Answer 6

In order for two reactants with each other they must have enough energy and must react with correct orientation

Question 7

Define rate of reaction

Answer 7

Change in concentration of reactant or product divided by Change in time

Question 8

why would some reactants be added in excess

Answer 8

so their concertation would remain constant so only the concertation of one reactant would vary

Question 9

why would the volumes need to remain the same

Answer 9

as the concentrations is proportional to volume

Question 10

how to determine whether a kinetic mechanism is correct?

Answer 10

state if the reagents in the rate equation are in the rate determining step
if they are, state if a reagent which is zero order is involved before or after the rate determining step