kinetics Flashcards
the gradient of a concentration vs time curve at point t gives…
the rate of reaction at time t.
rate is always…
positive
what is the standard rate law
rate of reaction = k[A]^m [B]^n
what are m and n
the order of the reaction
the rate law can only be …
determined experimentally.
the differential rate law tells us…
the rate of the reaction at a particular instant
what is the differential rate law
rate = -d[A]/dt = k[A]^n
the integrated rate law is an expression that gives us…
the concentration of a species as a function of time. They can be used to establish the order of a reaction and then the rate constant.
integrated rate law for zeroth order reaction
[A] = [A]0 -kt
integrated rate law for first order reaction
[A] = [A]0 e^-kt
integrated rate law for second order reaction
1/[A] = 1/[A]0 + kt
what is the definition of half life
the time taken for the concentration of the species to fall to half its initial value
at equilibrium the rate of forwards and backwards reactions are ….
equal
equation for rate at equilibrium
[B]eq / [A]eq = k1/ k-1 = K
for first order reactions the ln[A] against t should be…
a straight line (linear)
