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Ch 12 PPt
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chemical kinetics
the area of chemistry concerned with reaction rates and the sequence of steps by which reactions occur
Reaction rate
either hte increase in the concentration of hte product or the decrease in the concentration of a reactant per unit time
Reactant--> product
aA-->bB
Rate= -(delta[A])/ (deltat)
rate constant
a constant of proportionality between the reaction rate and the concentration of reactants
Rate law
an equation that shows the dependence of the reaction rate on the concentration of each reactant
The values of the exponents in the rate law __; they cannot be __
must be determined by the experimet
deduced from the stoichiometry of the reaction
Reaction order
the sum of hte powers to which all reactant concentrations appearing in the rate law are raised
Reaction order is determined experimentally:
a)
b)
a) by inspection
b) from the slope of a log (rate) vs. log[A] plot
Determination by inspection:
Use what rates
aA+bB=cC+dD
Rate=R=k[A]^m[B]n
initial
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Reaction Order with Respect to a Reactant
first and second order or more
first and second order or more
First order
reaction rate depends on the reacctant concentration raised to the first powre
A--> products
__ can be used to derive an __.
calculus
integrated rate law
A plot of __ versus __ gives a __ fit and the __ will be __.
ln[A]
time
straight-line
slope
-k
Half life
the time required for a reactant concentration to droop to one-half of its initial value
Author
DesLee26
ID
202331
Card Set
Ch 12 PPt
Description
Chem
Updated
2/25/2013, 3:30:20 AM
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