16: Kinetics II

Question 1

State what is meant by each quantity in the rate equation:

rate = k[A]^m[B]ⁿ

Answer 1

k = rate constant
[A] and [B] = concentration of reactants A and B
m and n = order with respect to reactants A and B

Question 2

State 4 suitable experimental techniques to obtain rate data for a given reaction.

Answer 2

Titration
Colorimetry
Mass change
Volume of gas evolved

Question 3

Deduce the order with respect to the reactant

Answer 3

0th order

Question 4

Deduce the order with respect to the reactant

Answer 4

1st or 2nd order

Question 5

Deduce the order with respect to the reactant

Answer 5

0th order

Question 6

Deduce the order with respect to the reactant

Answer 6

1st order

Question 7

Deduce the order with respect to the reactant

Answer 7

2nd order

Question 8

Describe how to use graphical methods to find the activation energy for a reaction from experimental data using the equation:
k = Ae^-E_a/RT

Answer 8

ln(k) = -E_a/RT + ln(A)

Plot ln(k) against 1/T,
Find gradient to calculate E_a