U2-3 - Reaction Kinetics Flashcards
Rate = k[A]m[B]n
What is k?
Rate constant
Rate = k[A]m[B]n
Where do the powers m and n come from?
Experimental data
(NOT balanced equation)
Doubling the concentration of X makes the rate double.
What is the order of reaction with respect to X?
1st order
Doubling the concentration of X makes the rate quadruple.
What is the order of reaction with respect to X?
2nd order
Doubling the concentration of X does not change the rate.
What is the order of reaction with respect to X?
0 order
Rate = k[A][B]2[C]
What is the order of reaction with respect to A?
1
(see power [A] is raised to)
Rate = k[A][B]2[C]
What is the order of reaction with respect to B?
2
(see power [B] is raised to)
Rate = k[A][B]2[C]
What is the overall order of reaction?
4
(sum of all the powers)
What is the rate determining step?
Slowest step in a reaction mechanism
(determines reaction rate)
State what is meant by order of reaction
The number of reactant molecules involved in the RDS.
