ANSWER ALL QUESTIONS

1. For the reaction below, if substance A is disappearing at a rate of 1.82 x 10–2

mol/Ls, at what rate is C appearing?

3 A + 3 B → 5 C + 2 D

2. Ozone (O3) is produced in the stratosphere by the chemical reaction shown below. If at a

given instant, molecular oxygen (O2) is reacting at a rate of 2.17 x 10–5

mol/Ls, at what rate is ozone being produced?

3 O2 (g) → 2 O3 (g)

Chemistry Unit

Session 2013/2014

Semester 2

Sample QUIZ Paper

NAME : ________________________________________________

MATRIC NUMBER : ________________________________________________

CLASS : ______________________________________________

NAME OF TUTOR : _____________________________________________

− 3. For the reaction, H2O2 (aq) + 3 I−

(aq) + 2 H+

(aq) → 2 H2O (l) + I3 (aq)

The rate law was experimentally determined to be Rate = k[H2O2][I−

]

a. What is the reaction order in terms of H2O2?

b. What is the reaction order in terms of I−?

c. What is the reaction order in terms of H+?

d. What is the overall reaction order of this reaction?

4. If a reaction is second order in B and the concentration of B increased from 0.0850 M to

0.2975 M, what should happen to the rate?

Answer :

1. 3.03 x 10–2

mol/Ls

2. 1.45 x 10–5

mol/Ls

3. a. First Order Reaction

b. First Order Reaction

c. Zreo Order Reaction

d. Second Order Reaction

4. Rate will increase by a factor of 12.3