# Kinetics

Rate equation

Graphs

Calculating constant, k

Experiments involving rate of reaction

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KINETICS
THINGS THAT EFFECT RATE OF REACTION...
There are FIVE things that affect the rate of reaction. These are:

1. Concentration of the reactants.
2. Pressure of the gases in the reactants and products.
3. Surface area of the reactants.
4. Catalysts added to provide an alternate route for the…

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EFFECTS OF CONCENTRATION ON THE RATE OF REACTION...
This is shown by the experimental rate equation:

In explanation to this equation:

K is the rate constant provided the reactions take place at a CONSTANT
TEMPERATURE.
[A] and [B] are the concentration of solutions A and B.
X and y are…

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ORDERS OF TWO...

When rate is plotted against [A], the graph will show a PARABOLA that GOES
THROUGH THE ORIGIN.
When [A] is plotted against time, the graph will show a RECTANGULAR HYPERBOLA
(an exponential curve that comes closer to the axis).

HALF LIFE...

The half life (t ½ )…

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EXPERIMENTAL METHODS...
These can be either non-interfering or interfering methods. Non-interfering methods of
collecting data are better to use than interfering methods.

NON-INTERFERING METHODS...

1. COLORIMETERS can be used to measure the change in colour intensity of
coloured solutions. The results collected can be shown as a CALIBRATION
CURVE, where…

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ANALYSING RESULTS FROM EXPERIMENTAL METHODS...
The INITIAL RATE METHOD uses the fact that all the concentrations of reactions
are known at the start of the reaction because they are what you put in.

FOR ORDER 0, the rate stays the same regardless of change of concentration.
FOR ORDER 1, the…