exam one rate stuff

Question 1

differential rate law

Answer 1

the mathematical relationship b/w the rate of rxn and the concentrations of the reactants

Question 2

differential rate:
A—>______
rate=_____

Answer 2

A—> products
rate = k[A]^n
with k being a rate constant in M/sec
and n being the reaction order

Question 3

the rate of a reaction is _____ to the concentration of each ____ raised to a power

Answer 3

proportional
reactant

Question 4

zero order reactions

Answer 4

n=0
rate= k[A]^0=k
-rate is a constant
-doubling [A] will have -no effect on the reaction rate
-flat time

Question 5

first order reactions

Answer 5

n=1
rate=k[A]^1=k[A]
-rate proportional to reactant concentration
-rate decreases as the reaction goes b/c concentration of reactant decreases
-diagonal line

Question 6

rate constant k units for first order reaction

Answer 6

when rate= M/sec
k= 1/sec

Question 7

second order reactions

Answer 7

n=2
rate= k[A]^2
-rate is proportional to the square of the reactant concentration
-rate is more sensitive to reactant concentration

Question 8

units for k in a second order reaction

Answer 8

when rate= M/sec
k= 1/M x sec

Question 9

multiple reactants

Answer 9

-only reactant appear in a rate law
-k is independent of reactant concentration
-overall order of the reaction = x + y + z

Question 10

reaction order for multiple reactants
( rate = and —> products)

Answer 10

aA + bB + cC —> products
rate = k[A]^x[B]^y[C]^z

Question 11

method of initial rates

Answer 11

1) measure the initial rate with 2 diff concentrations
2) change in rate is then direct result of the reactant which changed in concentration