Ch 12 PPt

The flashcards below were created by user DesLee26 on FreezingBlue Flashcards.

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
· 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