Summary A* student Notes CIE A-level Chemistry - Unit 8 - Reaction kinetics

REACTION KINETICS Deducing order of reactant
rate-time
concentration time
graph g
Rate of reaction




orde
-

the
change in the amount or concentration
of a reactant or product per unit time




·
rate of concentration
=
change in
reaction time




Rate equation
orders reaction
time(s) Concentra
of




·orde
+ B
44
for A - > C


rate of reaction =
k[A](BJL
-

the rate equation can
only &
be deduced
experimentally concentration
of reactants




metirst ↓
·
Order of reaction
-

shows how the concentration of a Mactant affects
the rate of reaction
-

it is the power a reactant is raised to

the order O it has effect
if is no
-




the overall order is the sum the orders
of
-



all



Half-life (tx) time(s)
- the time taken for the concentration of a
limiting Concentra
reactant to become half
From Half lives Hals liv
Rate determining step & intermediates -


h
O order




-




rate-determining
-



if a reactant is
step-slowest step of
in this step it will
a

be in the
reaction
rate
-

the half lives decrease with time
calcu