Instantaneous Rate of Reaction
Reaction rate at specific time point (t
1
) is called instantaneous rate.
[R](t)
[P](t)
[ ]
[
]
dt
R
d
dt
P
d
−
=
=
rate
Time
dP
dt
Concentration
P
R
→
t
1
Instantaneous rate equals the slope of the tangent at a specific time (t
1
).
Slope of tangent expressed by a derivative from calculus (e.g. d[P]/dt).
Units of rate:
M s
-1
or M min
-1
0
]
[
<
dt
R
d
(i.e. [R] decrease vs t)
Minus sign because

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