5.1

Question 1

Define rate of reaction

Answer 1

The change in concentration of a reactant or a product per unit time

Question 2

What is the rate equation?

Answer 2

k[A]¹[B]² = rate

Question 3

Describe zero, first, and second order

Answer 3

Zero - rate is unaffected by changing the concentration
First - rate is directly proportional to the concentration
Second - the change in rate will be equal to the change in concentration squared

Question 4

Zero order concentration-time graph

Answer 4

Straight line with concentration decreasing at a constant rate

Question 5

First order concentration-time graph

Answer 5

Curved line with constant half-life (halving of reactant concentration at equal time intervals)

Question 6

Zero order rate-concentration graph

Answer 6

Flat line, as the changes in concentration of the reactant have no effect on the rate

Question 7

First order rate-concentration graph

Answer 7

Straight line through origin increasing with constant gradient.

Question 8

Second order rate-concentration graph

Answer 8

Line curving upwards

Question 9

Define rate-determining step

Answer 9

The slowest step in a multi-step reaction