Chemistry A2 Chapter 18 - Rates of Reaction

Question 1

Define the term initial rate of reaction

Answer 1

The change in concentration of a reactant or product per unit time at the start of the reaction

Question 2

What is zero order?

Answer 2

When the concentration of a reactant has no effect on the rate
- any power raised to the power 0 is one
- concentration does not influence the rate

Question 3

What is first order?

Answer 3

A reaction is first order with respect to a reactant when the rate depends on its concentration raised to the power of one
- if the concentration of A is doubled, the rate increases by a factor of 2

Question 4

What is second order?

Answer 4

A reaction is second order with respect to a reactant when the rate depends on its concentration raised to the power of 2
- if the concentration of A is doubled, the rate of reaction increases by a factor of 4