Its everywhere man Q What does it involve A The combination of an elementmolecule with Oxygen in the air or water Q What is the balanced chemical equation Fe 3 C O ID: 361637
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Slide1
Oxidation
It’s everywhere man!Slide2
Q: What does it involve?
A: The combination of an element/molecule
with Oxygen in the air or water…
Q: What is the balanced chemical equation?
__Fe
3
C+__O2 ----> __C+__Fe2O
A: 4Fe3C+3O2 ----> 4C+6Fe2O
Q: What are some indicators that it has happened?
A: Rust, Tarnish, Patina, Corrosion, Fire,Slide3
The sandstone here is red & orange. This color change is due to a natural rusting process.
Natural Rust:
Q: What could make rock/dirt “rust”
A: The rocks/dirt have Iron (Fe) in them that is reacting
with Oxygen in the air/rain water causing the rust color
So, when you see rocks with this “rusted” color you know
That they likely have Iron (Fe) in them and that is oxidizing! Slide4
Patina
Brand New
120 years later it’s
a greenish color
Even Magnito (from X-men) knew what the S. of L. was made of!
Patina:
Patina is the result of Copper being oxidized!Slide5
Corrosion
Corrosion:
This is a picture of a concrete bridge that has collapsed! Metal rebar is used to hold up concrete, but it can get oxidized by water or air. When the metal “corrodes” it can’t support the concrete and it can collapse. Imagine how many bridges were built a LONG time ago and the metal has been there a LONG time…Slide6
Tarnish/Rust
Tarnish:Slide7
Spontaneous Combustion
Fast Oxidation (combustion):
The firework display you see here is the result of chemicals reaction VERY fast with oxygen in the air and you see the sweet explosion!Slide8
“Red” Blood?
Q: Why is blood red?
A: It has been oxidized!
Q: Where does the Oxygen
come from?
A: The blood from the heart first
goes to the lungs and reacts with the oxygen we inhale!
Q: What in our blood is the oxygen reacting with?A: Red blood cells have Iron (Fe) in themSlide9
Respiration is
Inhaling oxygenblood transport of oxygen and glucose (from food)
to cells to make energy (move, grow, reproduce, daily living stuff)!
Respiration:
The reaction looks like this:
C
6
H12O6 + 6O2 6CO2 +
6H2O + Energy
EnergySlide10
Plants do photosynthesis by
Obtaining water (H2O) and carbon dioxide (CO2)Absorbing sunlight (radiant energy)Converting it to food (chemical energy) C
6
H
12
O
6 and O2!Photosynthesis:
The reaction looks like this:6CO2 + 6H2O + Energy C6H12O6 + 6O2 Slide11
Life would not exist without Oxidation:
Photosynthesis:
6
CO
2
+
6H2O + Energy C6H12O6 + 6O2
Respiration:C6H12O6 + 6O
2 6CO2 + 6H2
O + Energy
Take a good look at the two reactions we
just discussed. Do you notice anything?
The two reactions are opposites of each
other! Plants make what we need,
and we make what plants need!
Think: what would happen
to everything If we eliminated
either the plants or the animals…Slide12
Oxidation Reactions combine oxygen with another substanceIt can be fast or slow (indicators will be different depending on speed)
Some of the indicators of oxidation are:Rust, Patina, TarnishExplosions/fire (fast reactions!)CorrosionLight (very fast reactions!)
Review: