Order Graphs

Question 1

zero order (concentration-time)

Answer 1

Concentration decreases at a constant rate, half-life decreases with time.

Question 2

first order (concentration-time)

Answer 2

Concentration halves in equal time intervals, half-life is constant.

Question 3

second order (concentration-time)

Answer 3

Concentration decreases rapidly, but the rate of decrease then slows down, half-life increases with time.

Question 4

zero order (rate-concentration)

Answer 4

The rate is unaffected by changes in concentration.

Question 5

first order (rate-concentration)

Answer 5

The rate is proportional to changes in concentration. If the concentration doubles, so does the rate.

Question 6

second order (rate-concentration)

Answer 6

The rate is proportional to the square of changes in concentration. If the concentration doubles, the rate increases by four times.