2.3 Kinetics

Question 1

What does the rate of a chemical reaction depend on?

Answer 1

the concentrations of the reactants

Question 2

What is order of reaction?

Answer 2

orders of reaction are used to relate the rate of reaction to reacting species

Question 3

What happens if a reaction is zero order with respect to one of the reactants?

Answer 3

if changing the concentration of the reactant has no effect on the rate of reaction

Question 4

What happens if a reaction is 1st order with respect to one of the reactants?

Answer 4

If doubling the concentration of the reactant then doubles the rate of reaction

Question 5

What happens if a reaction is 2nd order with respect to one of the reactants?

Answer 5

If doubling the concentration of the reactant quadruples the rate of reaction

Question 6

How can you tell the order of reaction of a reactant?

Answer 6

by looking at the equation and identifying the power to which the reactant is raised

Question 7

How can you work out the overall order of a reaction?

Answer 7

the sum of the powers to which the concentrations of the reactants are raised in the rate equation.

Question 8

How can the order of reaction be obtained?

Answer 8

from experimental data only

Question 9

How do reaction usually occur?

Answer 9

by a series of steps called a reaction mechanism

Question 10

What is the rate equation dependant on?

Answer 10

the slowest step - the rate determining step

Question 11

How can you determine possible reaction mechanisms?

Answer 11

experimentally determined rate equations