DETERMINING ORDER
CONTINUOUS METHOD
reaction mixture →
reactant is continuously measured
-
one cone of a
.
→ can
draw cone / time graph .
INITIAL RATE METHOD
'
several reaction mixtures made up with different concentrations
of a reactant → initial rate of reaction is measured (gradient
when c- = 0)
in one
rate =
change a constant
=
time time
•
plot f- against cone
✗
order first second
¥
zero
EXPERIMENTAL TECHNIQUES
titration ( sample & quench )
'
take a sample from reaction
-
stop reaction
-
cold water , add a base if acid catalysed .
til rate against standard solution find of product
'
cone
-
-
a
calorimetry
concentration of a coloured species can be measured by
light absorbtion
CONTINUOUS METHOD
reaction mixture →
reactant is continuously measured
-
one cone of a
.
→ can
draw cone / time graph .
INITIAL RATE METHOD
'
several reaction mixtures made up with different concentrations
of a reactant → initial rate of reaction is measured (gradient
when c- = 0)
in one
rate =
change a constant
=
time time
•
plot f- against cone
✗
order first second
¥
zero
EXPERIMENTAL TECHNIQUES
titration ( sample & quench )
'
take a sample from reaction
-
stop reaction
-
cold water , add a base if acid catalysed .
til rate against standard solution find of product
'
cone
-
-
a
calorimetry
concentration of a coloured species can be measured by
light absorbtion
