Please enable JavaScript.
Coggle requires JavaScript to display documents.
Rates of Reaction Experimental Methods - Coggle Diagram
Rates of Reaction
Experimental Methods
1. Collect Experimental Results
Colorimeter
D: measures amount of light absorbed
when passes through solution
recorded as absorbance
used for coloured
reactants/products
how work?
chosen filter let only wavelength
to be absorbed by coloured solution
method
calibration curve drawn with
known concentrations
colorimeter reading directly
related to concentration
Titrating
method
mix solutions
sample removed from pipette @ various times
sample quenched (paused)
to stop reaction
by rapidly cooling
or adding large vol water or chemical
(removes reactant not being monitored)
samples titrated to find conc
used to determine rate of
esterification reactions
(samples titrated w alkali)
Measuring pH
method
use pH meter
calculate H ion conc
using pH = -log10(H+)
Gas Syringe
method
monitor volume of gas produced over time
using gas syringe
diagram
2. Plot Graph Concentration
against Time
3. Find Gradient
if
curve
= measured by drawing tangent
to curve @ certain time + find gradient
RATE = GRADIENT
4. Plot Graph Rate
against Concentration
order graphs
5. Order
from
SHAPE
of graph