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WorksheetsChemistry rates of reaction
Total questions: 15
Worksheet time: 6mins
what is not a chemical reaction?
temperature change
staying the same
colour change
change in smell, or smell given off
bubbling/ fizzing
what is the name given to a substance which speeds up a reaction, without being used up?
(a)
label a piece of apparatus which can be used to collect gas :
as the concentration (a) the greater the likelihood of successful collisions
as the temperature increases the kinetic energy ...................
decreases
increases
stays the same
average rate =
change in quantity over change in time
change in time over change in quantity
the more collisions take place the .................... the rate of reaction
faster
slower
temperature is the measure of the average (a) energy of the particles
a catalyst works by providing the reaction with an ........................ pathway for the reaction to occur.
alternative
opposite
at the end of the reaction a catalyst can be found chemically .......................
unchanged
different
changed
does the mass of the catalyst stay unchanged after a reaction.
yes
no
particle size is the term used to describe the size of individual ................
molecules
particles
cells
reactions
the surface area of a substance is the area which is (a) to other substances.
as the particle size of substance is decreased its surface area will ....................
increase
decrease
as the particle size of a substance increases its surface area will ...................
increase
decrease
