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Page 2

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Gradient is different
Amount of product formed is the same
Temperature low
Temperature high ­
particles collide with more energy
The higher the
temperature the more energy the particle have, they
collide with more force so more successful collisions
so faster reaction
2.…read more

Page 3

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Gradient changes
Amount produced changes
Concentration of acid low
Concentration of
acid higher ­ more chance of particles colliding
The higher the
concentration the more particles, so there are more
successful collisions so faster reaction
(do not mix up with temperature, particle energy
remains the same)
3. Surface area
The smaller the particles the larger the surface area
e.g. Surface area is another reason why chips cook
fast. The surface area of a solid means the amount
of surface that is exposed to the outside.…read more

Page 4

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The higher the
surface area the more surface there is for collisions
so the more successful collisions so the faster the
reaction
Surface area of zinc low
Surface area of zinc
high ­ more zinc exposed to collisions
4.…read more

Page 5

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Hydrogen peroxide
decomposes very
slowly:
Hydrogen peroxide water + oxygen
But when a catalyst is added this decomposition is
much faster
An enzyme in the liver has the same effect; enzymes
are natural (biological) catalysts…read more

Page 6

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Most catalysts are specifics to one reaction only
The higher the surface area of the catalyst the
faster the reaction
Explosions
An explosion is when a very fast reaction releases a huge
amount of gas
Places where there are large amounts of dust (e.g.…read more

Page 7

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Experiment with acid and marble chips
Time (seconds) Volume of CO (cm )
15 16
30 25
45 44
60 86
75 95
90 107…read more

Page 8

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Gradient
y = 10 = 1.428571429 = 1.4
x 7
1.…read more

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