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Science
Chemistry
Chemistry: The Rate and Extent of Chemical Change: Key terms
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Cards (9)
Rate of reaction
a measure of how
quickly
a
reactant
is
used up
or a
product
is
made
Concentration
the
amount
of
substance
in a given
volume
, normally measured in
units
of
mol
/
dm3
Tangent
a
straight line
that
touches
a
curve
at
one point
Gradient
gradient = difference in the y-axis value / difference in the x-axis value
Catalyst
a substance that
speeds up
the rate of a chemical reaction, but is not
used
up in the reaction itself
Reversible
reaction
a
reaction
that can go
forwards
or
backwards
Closed system
where nothing can enter or leave
Equilibrium
when the
rate
of
forward
reaction is
equal
to the
rate
of
backwards
reaction
Le Chatelier's Principle
a rule that can predict the
effect
of changing
conditions
on a system that is in
equilibrium
