Kinetics Flashcards
What is the formula for the rate of a chemical reaction
Rate=k[A] where k is the constant and A is the concentration of reactant a
What is order of the reactions used for
To relate the rate of reaction to the reacting species
What does [A] to the power of 0 mean
If changing the concentration of reactant A, has no effect on the rate of reaction, the reaction is said to be zero order with respect to A
What does [A] to the power 1 mean
If doubling the concentration of A doubles the rate of reaction, the reaction is said to be first order with respect to A
What does [A] to the power 2 mean
If doubling the concentration of A increases the rate of reaction fourfold, the reaction is said to be second order with respect to A
What is the overall order of a reaction
The overall order of a reaction is the sum of the powers to which the concentration of the reactants are raised in the rate reaction
What is the formula for overall order of a reaction
Rate=K[A]m[B]n where m and n are rate coefficients
How can the order of a reaction be determined
From experimental data
How do reactions usually occur
By a series of steps called a reaction mechanism. The rate of a reaction is dependant on the slowest step called the rate determining step.
What is kinetics
The study of factors which alter the rates of chemical reactions
What is K, m snd n in the equation rate=k[A]m[B]n
K is the rate constant which is dependant upon temperature and m and n are the orders of the reaction with respect to the reactants
What are the units for order of reactions
1st order- s-1
2nd order- mol-1s-1
3rd order-mol-2s-2
Practice rate K questions
Whats a reaction mechanism
A set of theoretical steps proposed to account for the reactants Being converted into products
Whats the rate determining step
The slowest step is the one that controls the overall rate of reaction
