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Unformatted text preview: 11/18/10
 Calcula&ng
the
Effect
of
a
Common
Ion
on
Solubility
 Solubility
–
pure
water
 1.2
x
10–2
 Stop
Nov.17
 Predic&ng
the
Effect
on
Solubility
of
Adding
a
Strong
Acid
 Le
Chatlier
Principle
!
 PLAY MOVIE 1
 11/18/10
 Get
 Yellow
ppt.

 2
 11/18/10
 See
Example
16.9
(page
695)
in
text.
 Calculate
solubility
of
AgBr(s)
in
water
compared
 to
when
a
AgBr(s)
is
placed
in
1
Molar
NH3
(aq)
 •  Enhance
solubility
of
AgBr(s)
in
photography:
 •  AgBr(s)

+

S2O32–










Ag(S2O32–)23–


+


Br–
 Thiosulfate
part
of
“fixer”
soluLon;
brings
Ag +from
unexposed
film
into
soluLon
 3
 11/18/10
 Metal
Ion
Acidity
 Part
of
discussion
of
Lewis
acids
&
metal
complexes
 •  Dissolve
Fe3+
in
water;
obtain
an
acidic
soluLon
 •  FeCl3
(or
Fe(NO3)3)


–––>




–––>





[Fe(H2O)6]3+
 •  [Fe(H2O)6]3+


+


H2O















H3O+


+


[Fe(H2O)5(OH–)]2+
 Ka
=
7.7
x
10–3

=


usual
expression
 What
is
the
pH
of
a
0.1
M
soluLon
of
Fe(NO3)3
?
 




(x)
(x)
/
(0.1
–
x)

=

7.7
x
10–3








–––>



–––>







pH
=
1.62
 
ApplicaLon
of
Acid‐Base
Equilibria
to
Metal
Ion
CoordinaLon
Complexes
 (Lewis‐Acid/Lewis‐Base
Complexes)
 Chapters
10
–
11



 Liquids,
Phase
Transi&ons,
Solu&ons
 3
States
of
MaWer
 3
States
of
MaWer
 4
 11/18/10
 Intermolecular
Forces
 Intermolecular
Forces
 (a)
The
electrosta&c
interac&on
 of
two
polar
molecules.
 (b)
The
interac&on
of
many
 dipoles
in
a
condensed
state.
 5
 11/18/10
 6
 11/18/10
 Dispersion
(London)
Forces
 Dispersion
Forces
are
primarily
responsible
for
the
condensed
 states
of
non
polar
substances.
 A.
Dispersion
forces
are
caused
by
momentary
oscillaLons
of
 electron
charge
 B.
These
momentary
oscillaLons
form
an
instantaneous
dipole
 C.
When
a
molecule
with
an
instantaneous
dipole
comes
to
to
 another
atom
can
then
induce
a
dipole
on
its
neighbor.
 separated
Cl2
 molecules instantaneous
 dipoles
 Physical
Proper&es
of
Liquids
 •  There
are
4
physical
properLes
of
liquids
that
we
 can
relate
to
the
intermolecular
afracLons
 present
in
the
molecules:
 –  vapor
pressure
 –  boiling
point
 –  viscosity
 –  surface
tension
 20
 7
 ...
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This note was uploaded on 04/08/2012 for the course CHEM 101 taught by Professor Draper during the Spring '06 term at Johns Hopkins.

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