Kinetics

Question 1

What is the rate of reaction

Answer 1

The change of concentration of a reactant or product with respect to time

Question 2

What is the order of reaction with respect to a reactant

Answer 2

The power to which the reactant is raised to in the rate equation

Question 3

What is the overall order of reaction

Answer 3

The sun of the powers to which the concentration terms are raised to in the rate equation

Question 4

What is the rate constant

Answer 4

The proportionality constant which links the rate of the reaction to the concentrations in the rate equation

Question 5

What is the rate determining step

Answer 5

The slowest step in the mechanism of a reaction

Question 6

What can increase the rate of a reaction

Answer 6

Increase temp = Increase rate
Increase surface area = Increase rate (solid)
Increase concentration = Increase rate (liquid)
Increase pressure = Increase rate (gases)
Introduce catalyst = Increase rate

Question 7

What is a homogeneous catalyst

Answer 7

Catalyst in the same physical state as reactants

Question 8

What is a heterogenous catalyst

Answer 8

Reactants and catalyst in different physical state

Question 9

What are the four experimental methods for determining rate

Answer 9

Titration
Colorimeter
Gas volume
Conductivity

Question 10

What allows for titration to be used to find rate

Answer 10

If one of the reactants is I2, Fe2+,H2O2 or an acid/base

Question 11

How would you preform a titration to find the rate

Answer 11

A sample would be taken at set time intervals and the reactions stopped by quenching and then the sample would be titrated with a suitable standard solution and indicator.

Then a concentration against time graph would be plotted and a tangent drawn