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PAPER 2 CHEMISTRY
rate of reaction
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Cards (9)
calculations to work out the rate of reaction?
rate=
increase
in products/time
rate=
decrease
in reactants/time
how temperature affects the rate of reaction?
-increase
temperature
-more
kinetic
energy of particles
-more
frequent
,
successful
collisions
-rate of reaction
increases
how concentration/pressure affects the rate of reaction?
-increase in
concentration
of
temperature
-more particles in a
fixed
volume
-more
frequent
,
successful
collisions
-rate of reaction
increases
how surface are affect the rate of chemical
reaction
?
-increasing
surface
area
-increasing
surface
area:
volume
ration
-more
surface
to react
-more
frequent
,successful collisions
-rate of reaction
increases
how a catalyst affects the rate of reaction?
-catalyst lowers the
activation energy
providing a different
reaction
pathway
-more
frequent
,
successful
collisions
-rate of reaction
increases
what is activation energy?
the
minimum
energy needed for a
reaction
to
start
method 1 of measuring the rate of reaction?
-measure
starting
mass
-the mass will
decrease
as the
gas
produced
leaves
the flask
-record the
mass
every
20
secs
-calculate the
loss
of mass per
second
method 2 of measuring the rate of reaction?
-mix
the reactants and start the stopwatch
-the reaction produces a
white
solid,which covers the
black
cross
-times how long it takes for the cross to
disappear
method 3 of measuring the rate of reaction?
-mix
the
reactants
and start the
stopwatch
-the
gas
produces will start to
fill
the
gas syringe
-time how
long
it takes to collect a
specific volume
of
gas
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