41
Carbon is C. CO2 is only one form that can take the carbon knowing that our bones are made of
Carbon, pencils are made of Carbon called Graphite, and many things around us are made of
Carbon.
CO2 means that an atom of Carbon bonds with 2 atoms of Oxygen. The equation could also be
written that way: COO = CO2.
This meeting of two basic elements is called a Chemical Reaction.
What does SO2 mean then?
It means that
_______________________________________________________________________
In the following equation:
SO2 + H2O = H2SO3
the basic elements add to each other.
Can you write this equation in a different way?
SO2 + H2O = ______________________ = H2SO3
See how the elements add to each other. In this equation, SO2 + H2O, we have:
How many atoms of Oxygen (O)? Cross out the wrong answers:
1
2
3
How many atoms of Hydrogen (H)? Cross out the wrong answers:
1
2
3
How many atoms of Sulphur? Cross out the wrong answers:
1
2
3
Add then one to each other as in a traditional addition:
You get:
2 O+ 1 O = O2 + O1 = 3 O or O3
O3 + H2 + S1 = H2 SO3
42
The order the elements are written down follow an alphabetical order (H is before S which is
before O).
Now, try to find out the solution to this equation or chemical reaction:
SO2 + 1/2O2 = ___________________
95 % of the nitrogen oxides (Nox) in the atmosphere are the result of human activities;
5% come from natural processes.
Here are several sources of nitrogen oxides. Determine if they are from human origin or natural
origin, or both. Cross out the right answer:
Source
Human
Natura
l
Combustion of oil, coal, gas
Bacterial action in soil
Forest fires
Volcanic action
Lightning
Here is the Chemical Reaction with the nitrogen dioxides (NO). Can you solve it?:
NO + 1/2O2 = _________________________________?
NO2 + OH = _______________________________?
These chemical elements therefore are produced into the air and fall over the earth with the rain,
the snow, etc. It is called Acid Rain.
Acid Rain:
Sulfur (from coal)
& nitrogen (from high
temperature flames)
& oxides (from cities &
industry)
chemical reactions with
moisture in the air
»»falls many miles away
Sulfuric & nitric acids form
acid rain
Affects
Trees + rivers
That word acid rain is formed by two words: “acid” and “rain”.
 |
 |
 |
 |