Rates of Reaction - Introduction

Question 1

rate of a chemical reaction definition

Answer 1

the speed at which the raction occurs

the speed at which the reactants are used or products are produced

Question 2

How many ways can rates be measured?

Answer 2

7

Question 3

List all the ways rates can be measured

Answer 3

• change in mass of reactnats/products
• concentration
• change in pH (acids/bases)
• change in conductivity (ion production)
• change in colour
• change in temperature
• change in colume or pressure ( for gasses only)

Question 4

how does rate and slope relate?

Answer 4

rate = -slope

Question 5

average rate or reaction definition

Answer 5

the change in concentration in a gicen time period

Question 6

how is rate expressed?

Answer 6

in terms of the amount of a product produced or the amount of a reactant consumed

Question 7

effective collisions definition

Answer 7

particles collide and it resutls in the formation of a product

Question 8

What is needed for an effective collision?

Answer 8

• must occur at correct orientation
• must have a minimum amount of energy

Question 9

collision model

Answer 9

the idea of effective collisions - the rate of a reaction is affected by the number of effective collisions between reactant molecules

Question 10

according to the collision model how can the rate of reaction be increased?

Answer 10

increasing the number of collisions or by increasing the number of effective collisions