1.9 Rate Equations

Question 1

What does the rate equation show?

Answer 1

The relationship between the rate and the initial concentrations of reactants

Question 2

Overall order of a reaction

Answer 2

The sum of the individual orders

Question 3

Units of the rate constant

Answer 3

Depend on the overall order of the reaction

Question 4

How can the concentration of reactants be measured during a reaction?

Answer 4

• Volume of gas produced
• pH
• Change in mass
• Absorbance in coloured solutions

Question 5

How can the concentration of a reactant be kept constant during a reaction?

Answer 5

By keeping it in a large excess

Question 6

Quenching

Answer 6

• Stopping a reaction (to measure concentrations)
• Done by placing it in an ice bath

Question 7

Rate determining step

Answer 7

The slowest step in a reaction mechanism

Question 8

Which steps effect the rate of reaction?

Answer 8

All the steps up to and including the rate determining step

Question 9

Arrhenius equation

Answer 9

Shows relationship between rate constant and temperature

Question 10

Units of the Arrhenius constant

Answer 10

Match units of k