Lecture
17
Overview
The value of KC is specific to chemical reaction equation
·
Manipulation can
change the value of :
↓
↳ reverse ran
gives
:
Ka
↳
multiply ranby x gives (2) :
↳
adding 2 rans
gives · ka
:
K
principle if you make that results
Le Chatelier's change to
system in
-
a a
then the concentrations of species will QC
QEhc ,
change until
again
kc Algebra-manipulating equilibria
OGran :
2A +
B =- 2C K ,
=
100 k,
= =
double ran: Important :
Ka /k ) a
==
4A +
2B =
4( =
h cannot bea
kn
,
-
negative number
half :
!
ran
A + B( Kz
:
(k) "2
Kz = =
it
reverse th :
2 = 2A +
B kn = =
Idea!
Big
Coupling equilibria
adding 2 rans
-
,
↓
Know =
D k 100
=
.
m
K2 =
50 M
2AZ2D Know =??
↳ new
Lechatelier's Principle "If chemical reaction at equilibrium is subjected
-
a
to a change in conditions that displaces it from equilibrium then the reaction
adjusts toward new equilibrium state" CQ changes to meetagains
a
Nat3He2NH3
xmoles Na
ymoles He what happens if we
add Ne(g) ? denominator increases ,
NH3 originally Q smaller
=
z moles he : = number
gets
add N2 : Quew- Kn
Q =
Ka
spontaneous [
, if we add NHzI
what happens more
numerator increases
:
,
original : Q =
K number increases
add NH3 Qnew :
> k K
adding Ha0 can affect
nonspontaneous dilution of accueous
will
species which
what happens if we remove NHz ? affect Q
Q KC less numerator means
spontaneous
=
is smaller 2 d less number
Qnew
Ec :
S
Quaw Ka [N2] [Ha]
What happens if we add O2 ?
nothing changes or not part of ,
ran so does not affect he
equation
vol
double the of the container ? double etratio
What happens if we size
NH
new
Q,
original
H
Kn
=
: =
Q Oc
double volume : Q is
bigger
naw :
Q k 4Q
change nonspontaneous :
-
Lecture 18
Overview
Changing temperature does not change Oc rather changes
·
, , L
of Kn,
Increasing temperature of an endothermic reaction will increase the value
·
while of exothermic
increasing temp van decreasesKo
the solubility is the maximum amount of compound that can be dissoled
·
a
Mol
in 12 of .
water Units /
solubility equilibria describes the dissolution of ionic
compound . Reactants
·
an
have solid ionic compound and products have hydrated ions Equilibria . constant is
Ksp which always has denominator of 1
,
17
Overview
The value of KC is specific to chemical reaction equation
·
Manipulation can
change the value of :
↓
↳ reverse ran
gives
:
Ka
↳
multiply ranby x gives (2) :
↳
adding 2 rans
gives · ka
:
K
principle if you make that results
Le Chatelier's change to
system in
-
a a
then the concentrations of species will QC
QEhc ,
change until
again
kc Algebra-manipulating equilibria
OGran :
2A +
B =- 2C K ,
=
100 k,
= =
double ran: Important :
Ka /k ) a
==
4A +
2B =
4( =
h cannot bea
kn
,
-
negative number
half :
!
ran
A + B( Kz
:
(k) "2
Kz = =
it
reverse th :
2 = 2A +
B kn = =
Idea!
Big
Coupling equilibria
adding 2 rans
-
,
↓
Know =
D k 100
=
.
m
K2 =
50 M
2AZ2D Know =??
↳ new
Lechatelier's Principle "If chemical reaction at equilibrium is subjected
-
a
to a change in conditions that displaces it from equilibrium then the reaction
adjusts toward new equilibrium state" CQ changes to meetagains
a
Nat3He2NH3
xmoles Na
ymoles He what happens if we
add Ne(g) ? denominator increases ,
NH3 originally Q smaller
=
z moles he : = number
gets
add N2 : Quew- Kn
Q =
Ka
spontaneous [
, if we add NHzI
what happens more
numerator increases
:
,
original : Q =
K number increases
add NH3 Qnew :
> k K
adding Ha0 can affect
nonspontaneous dilution of accueous
will
species which
what happens if we remove NHz ? affect Q
Q KC less numerator means
spontaneous
=
is smaller 2 d less number
Qnew
Ec :
S
Quaw Ka [N2] [Ha]
What happens if we add O2 ?
nothing changes or not part of ,
ran so does not affect he
equation
vol
double the of the container ? double etratio
What happens if we size
NH
new
Q,
original
H
Kn
=
: =
Q Oc
double volume : Q is
bigger
naw :
Q k 4Q
change nonspontaneous :
-
Lecture 18
Overview
Changing temperature does not change Oc rather changes
·
, , L
of Kn,
Increasing temperature of an endothermic reaction will increase the value
·
while of exothermic
increasing temp van decreasesKo
the solubility is the maximum amount of compound that can be dissoled
·
a
Mol
in 12 of .
water Units /
solubility equilibria describes the dissolution of ionic
compound . Reactants
·
an
have solid ionic compound and products have hydrated ions Equilibria . constant is
Ksp which always has denominator of 1
,
