Kinetics CH119 Flashcards
(9 cards)
Kinetics is the study of…
Reaction rates
How concentrations of reactants/products change over time
What is the rate of reaction from the equation
A+2B=C+3D
Rate of reaction = - d[A]/dt = - 1/2 d[B]/dt = d[C]/dt = 1/3 d[D]/dt
What is a complex reaction
A reaction consists of a series of elementary steps
K (rate constant) is independent of…but depends on…
Concentration, temperature
What is an example of a rate law
Rate = k[A] [B]
If rate of reaction falls by a factor of 4 when a concentration of a substance is reduced from 2M to 1M, what is reaction order with respect to that substance?
When the substance falls by factor of 2 rate falls by 4 thus 2nd order
What is the isolation method
Concentration of all reactants except one are in large excess
Allows you to simplify the rate law which is only dependant on conc of one reactant
If in a reaction A+B=C, A is 1000 times the concentration of B what can we assume about A?
A is constant
What is K(eff)
Effective rate constant
