Q&A GAME
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EQUILIBRIUM!!!!! WOO HOOO!!!
-By: OB1
JEOPARDY!
The
Le
More K &
General
Reaction
Equilibrium
Chatelier's Q & Le
Equilibrium
Quotients
Constant
Principle
Chat ?'s
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What is a reversible
reaction?
When products collide to reform the
reactants.
What is chemical
equilibrium?
When the rate of the forward reaction
equals the rate of reverse reaction.
Does the reaction stop when it
is at equilibrium?
NOOOOOOO!!!!
What is dynamic equilibrium?
The idea that the overall reaction is
constantly changing although the
concentration of the products and
reactants remains constant.
Why is the collision theory
applicable to equilibrium?
Because collisions occur with the
products to re-form reactants.
What is the equilibrium
constant?
The ratio of products to reactants at
equilibrium.
What is the equilibrium
constant expression?
The formula that shows the ratio of
products to reactants at equilibrium.
What types of matter are
excluded from the equilibrium
constant expression?
Solids & Pure Liquids.
Daily Double!!!
What is the equilibrium
constant expression of the
following reaction:
N2(g)+3H2(g)<->2NH3(g)
Keq=[NH3
2
] /[N
2][H2
3
]
Calculate the equilibrium
constant when there is .48M
of N2, .75M of O2, and .03M of
NO if the reaction is:
N2(g)+O2(g)<->2NO(g)
Keq=.0025
What is the reaction
quotient?
The current state the reaction is in.
How can the reaction quotient
be calculated?
By using the equilibrium constant
expression, and plugging in the current
concentrations.
What will happen to the
reaction if the reactant
quotient is greater than the
equilibrium constant?
More reactants will form.
Calculate the reaction quotient
of the following reaction:
N2(g)+O2(g)<->2NO(g)
if Keq=.0025 when the
concentration of N2 is .95M,
O2 is .60M, and NO is .02M,
and determine which way the
reaction will shift.
Q= 7.0*10-4
The reaction will shift to the right.
Calculate the reaction quotient for the
following reaction:
Fe2O3(s)+3H2(g)<->2Fe(s)+3H2O(g)
when the equilibrium constant is .064, and
the concentration of H2 is .320M and H2O is
.460M and which direction will the reaction
shift.
Q= 2.97
The reaction will shift to the left.
What is Le Chatelier's
Principle?
The principle that if the system at
equilibrium is disturbed, it will proceed in
one direction or the other in order to reestablish equilibrium.
What happens to the system
at equilibrium when product is
added?
Makes more reactant, shifts to the left.
What happens when volume
is increased in the following
reaction:
2CO2(g)+O2(g)<->2CO2(g)
Reaction will shift to the left, forming more
reactant.
What happens to an
endothermic reaction when
heat is added to the reaction?
Shift to the right forming more products.
What happens to the reaction when Fe
is added to the following reaction:
Fe2O3(s)+3H2(g)<->2Fe(s)+3H2O(g)?
Nothing. Iron is a solid and doesn't effect
equilibrium.
What is the equilibrium
constant expression for
2H2(g)+O2(g)<->2H2O(g)?
K=[H2O]2/[O2][H2]2
What is the equilibrium constant
expression for
NaCl(s)+H2SO4(l)<->HCl(g)+NaHSO4(s)?
K=[HCl]
Find the Keq of the reaction
2SO2(g)+O2(g)<->2SO3(g), if the
concentration of SO2 is .175M,
O2 is .35M, and SO3 is .7M
Keq= 32
What is the reaction quotient
of CaCO3(s)<-> CaO(s)+CO2(g)
when there is 12g of CaCO3,
and .0003M CO2? And what
direction will the reaction shift
if Keq=5.10?
Q=.0003
Reaction will proceed to the right.
Which way will the reaction
proceed if pressure were
increased in the following
system at equilibrium:
N2(g)+O2(g)<->2NO(g)
It will not shift, because there are equal
number of moles of gas on either side of
the reaction.
What happens to the
equilibrium constant if a
catalyst is added?
The equilibrium constant
remains unchanged.
What does a large equilibrium
constant mean?
The reaction is product favored.
What effect does
temperature have on the
equilibrium constant?
For forward reactions that react easier
with more temperature, will increase the
Keq when temperature is increased &
reverse reactions that occur easier with
more temperature, will decrease when
temperature is increased.
How will the following reaction
shift if more Br2 is added?
2NO(g)+Br2(g)<->2NOBr(g)
It will shift to the right.
If the Keq is 1.2*10-4 and the
concentrations of N2 is .166M
and O2 is .145M, what is the
concentration of NO?
N2(g)+O2(g)<-> 2NO(g)
[NO]= 2.88*10-6
Final Jeopardy
WARNING:
This is an Ap Chem problem
Enjoy!!
A buffer solution contains .1 mol
of acetic acid, and .13 mol of
sodium acetate in 1L. What is the
pH of this buffer(a), and what is
the pH of the buffer after .02 mol
of KOH is added(b)? Ka of acetic
acid is 1.8*10-5
(a)
pH=4.86
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(b) pH=5.02