Redox Reactions and Ionic Compound Formation
Ion formation viewed a different way: `redox’ reactions (pp 64-67)
Na
+
Cl
e-
Na
+
Cl
-
Loses
e-
Gains
e-
Na pitches
=> oxidized
(
ox
)
Cl catches
=> reduced
(
red
)
Ionic compound formation results from
e
-
`
pitch
and
catch’
ox=oxidation
red= reduction
Reduction
-
oxidation
Abbreviated as
Red
ox
Na
+
Cl
e-
Na
+
Cl
-
Old school Memory devices:
Oil
Rig
L
ose
e
lectrons
o
xidation-
G
ain
e
lectrons
r
eduction
O
xidation
i
s losing (e-).
R
eduction
i
s
g
aining (e-).
Leo
-Ger
ox=oxidation
red= reduction
Loses
e-
Gains
e-
Identifying who loses and gains….follow the charge change
Mg
o
+ Cu
2+
Mg
2+
+ Cu
o
ID `ox’ and ‘red’ in reaction below
Loses
2e-
Gains
2e-
Memory device: Leo-Ger
L
ose electrons
o
xidation (ox)
G
ain
e
lectrons
r
eduction (red)
ox
red
2e-
2Na
o
+ Cl
2
2NaCl
+1
-1
2e-
Loses
2e-
Gains
2e-
ox
red
…more practice in class on board….
Ford Focus all electric car
High surface area
lithium ion batteries
Li
x
C
6
xLi
+
+ 6C + xe-
Cathode (right side=red)
0
0
Power cycle – what happens as you drive
+1
Anode (left side =ox)
Li
o
embedded in `
i
ntercalation
’ compounds
on both sides
Li
1-x
CoO
2
+ xe- + xLi+
LiCoO
2
Key
Chemistry
trick:
+1
LOAD
http://www.youtube.com/watch?v=6evFK8y-zdw
On to the
organic stuff
Inorganic stuff
CHAPTER 2: DIRT
What makes rocks
the way they are
?
(text version, p. 46
“Why do minerals
exist?”
What we’ve
just covered…
•
Answer:
mostly ionic
bonds between (+) and (-)
atoms with inert gas count
of electrons.
•
Practical bonus:
electron motion
as ions form can do useful work,
.e.g. make a
battery
Chapter 3: Diamonds
Chapter 2: Dirt
What
about the
organic
stuff ???
What holds together
diamonds, poo and you ???
(text version: Why is carbon special ?)
Organic (Plastics, poo and you)
vs.
Inorganic (Minerals/Rocks)
Organics
Inorganics
Mostly made of
Metals, O, rest of
Periodic Table
(C plays only a small
part)
Ex:
Saran wrap
Ex
.
limestone
Main electronic
arrangement:
covalent bonds
Main electronic
arrangement:
Ionic bonds
Mostly made of C, H, O
Some N (minor pieces
of rest of Periodic Table
Organics
Inorganics
Octane ( gasoline) 2D image
Octane in 3D
model
Organics vs Inorganics : the difference in picture form
covalent bond: the `new’ idea
ionic bond
Note the absence of charge
in organic picture
Language basics of the `covalent’ bond
•
Electron pair bond
•
Valence bond or valence pair bond
•
Lewis pair bond
•
Shared electron bond
Other common names for
covalent bond
Language basics of the `covalent’ bond
1 line= single bond with 2 electrons
(bond order 1)
2 lines= double bond
with 2 x 2= 4 electrons
(bond order 2)
Total of
bonding e-
Bond language and electronic book keeping: part 1
7 x2=14
6 x 2=12
# bonds
7
6
Language basics of the `covalent’ bond
3 lines = triple bond
With 3 x 2= 6 electrons
(bond order 3)
Total of
bonding e-
Bond language and electronic book keeping: part 1
(continued)
5 x 2=10
# bonds
5
In-class Board practice counting
bonds and electrons for organics
Explore the concept of redox reactions through the process of ion formation, where elements lose or gain electrons to create ionic compounds. Learn about oxidation (ox) and reduction (red) in chemical reactions, and how to identify which elements lose or gain electrons based on charge changes. Discover practical applications such as lithium ion batteries in electric cars. Dive into the world of chemistry with a focus on ionic bonds, electron motion, and the formation of minerals and rocks.
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Presentation Transcript
Ion formation viewed a different way: `redox reactions (pp 64-67) Ionic compound formation results from e- `pitch and catch e- Na+ Cl- Na + Cl Loses e- Gains e- Reduction-oxidation Abbreviated as Redox Na pitches => oxidized (ox) Cl catches => reduced (red) red= reduction ox=oxidation
Old school Memory devices: e- Na+ Cl- Na + Cl Loses e- Gains e- ox=oxidation red= reduction Leo-Ger Lose electrons oxidation-Gain electrons reduction Oil Rig Oxidation is losing (e-). Reduction is gaining (e-).
Identifying who loses and gains.follow the charge change ID `ox and red in reaction below 2e- Mgo + Cu2+ Loses 2e- Gains 2e- ox 2e- Mg 2+ + Cuo Memory device: Leo-Ger Lose electrons oxidation (ox) Gain electrons reduction (red) red +1 -1 2Nao + Cl2 Loses 2e- Gains 2e- ox 2NaCl more practice in class on board . red
Ford Focus all electric car High surface area lithium ion batteries
Power cycle what happens as you drive Key Chemistry trick: LOAD 0 +1 Lix C6 Anode (left side =ox) xLi+ + 6C + xe- 0 +1 Li1-xCoO2 + xe- + xLi+ LiCoO2 Cathode (right side=red) Lio embedded in `intercalation compounds on both sides
What weve just covered Answer: mostly ionic bonds between (+) and (-) atoms with inert gas count of electrons. Practical bonus: electron motion as ions form can do useful work, .e.g. make a battery CHAPTER 2: DIRT On to the organic stuff What makes rocks the way they are ? Inorganic stuff (text version, p. 46 Why do minerals exist?
Chapter 3: Diamonds Chapter 2: Dirt What about the organic stuff ??? What holds together diamonds, poo and you ??? (text version: Why is carbon special ?)
Organic (Plastics, poo and you) vs. Inorganic (Minerals/Rocks) Organics Ex: Mostly made of C, H, O Some N (minor pieces of rest of Periodic Table Inorganics Ex. limestone Saran wrap Mostly made of Metals, O, rest of Periodic Table (C plays only a small part) Main electronic arrangement: covalent bonds Main electronic arrangement: Ionic bonds
Organics vs Inorganics : the difference in picture form covalent bond: the `new idea ionic bond Organics H Inorganics H H H H H H H H C C C C C C C C H H H H H H H H H Octane ( gasoline) 2D image Note the absence of charge in organic picture Octane in 3D model
Language basics of the `covalent bond Other common names for covalent bond Electron pair bond Valence bond or valence pair bond Lewis pair bond Shared electron bond
Language basics of the `covalent bond Bond language and electronic book keeping: part 1 H H H H H C C H C C H H H H 1 line= single bond with 2 electrons (bond order 1) 2 lines= double bond with 2 x 2= 4 electrons (bond order 2) # bonds 7 6 7 x2=14 6 x 2=12 Total of bonding e-
Language basics of the `covalent bond Bond language and electronic book keeping: part 1 (continued) H C C H 3 lines = triple bond With 3 x 2= 6 electrons (bond order 3) # bonds 5 Total of bonding e- 5 x 2=10
In-class Board practice counting bonds and electrons for organics
