ENVIRONMENTAL IMPACT
OF CHEMICAL REACTIONS
(END PRODUCTS)
Chemical reactions
result in new
substances being
produced that can
simultaneously
provide both
positive and
negative
environmental
impacts.
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Vocabulary :
end product:
The result of a completed series of processes or changes.
environmental impact:
Any change to the environment,
whether adverse or beneficial,
wholly or partially resulting from an
organization's activities, products
or services
economic impact:
Any increase or decrease in the
productive potential of the
economy.
2
BURNING PAPER?
The end product was different than
the reactant.
What could have been done with the
paper other than burning it or the
usefulness of the reactant.
REACTANTS
While the paper was burning, some
pretty useful stuff was produced,
such as…….,
light and heat
Compare it to a campfire …..
fire provides light to see and the
heat needed to stay warm and cook
food.
3
ASHES
What was the final product, ash,
good for?
END PRODUCT
For the most part,
ash is not much fun to deal with.
It is messy and not very useful.
4
What chemical reactions or uses of
chemicals have negative waste products or
consequences?
If a farmer does not use fertilizer, his
crop will not grow as well and he will
produce less and make less money,
but if he does use fertilizer, the
residue may run off into local rivers
and ultimately into the ocean which
could cause algae blooms that kill
off aquatic wildlife.
If a farmer does not use
pesticides, his crop will
suffer and he will produce
less and make less money,
but if he does use them,
levels of toxins can build up
in local ground water making
the water unfit to drink.
5
If a power plant does not control its
smokestack emissions, pollution will
add to the acid rain effect, but if they
put in equipment to control emissions
their operating cost and the cost of
electricity goes up.
If a person carpools they help to
produce less pollution and they save
money, but they lose some
independence in traveling.
6
What chemical reactions or uses of
chemicals have negative waste products
or consequences?
•Car (Combustion) exhaust
•Smoke pollution from industrial plants
(release of sulfur dioxide)
•Fertilizer run off
•Hot water being released from industrial plants
•Acid Rain
•‘Greenhouse’ Gases
•Chemical spills (release of heavy metals)
7
Throughout modern history,
mankind has had to deal with the
negative effects of certain chemicals
and the end products of certain
chemical reactions.
However, many of the mistakes
that have been made have been
correctable through action.
8
Two examples of problems that, if not
solved, have been greatly improved are
acid rain and chemicals affecting the
ozone layer.
9
Most chemicals and chemical
reactions have both good and bad
consequences.
Many negative impacts can be
avoided or corrected once steps are
taken to fix the problem, but there
are costs involved.
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RESEARCH GOALS:
• Identify the positive and negative
impacts of the chemical or
chemical reaction researched
• Economical pros and cons
• Environmental pros and cons for
either not using the process or for
controlling the negative impacts
• Suggest solutions that can
maximize the pros and minimize
the cons.
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POSTER REQUIREMENTS:
• MAIN DRAWING (BY HAND)
• GRAPHICS (2) FROM INTERNET
• ECONOMIC/ENVIRONMENTAL
PROS & CONS
• POSSIBLE SOLUTIONS
• CREATIVE
• COLORFUL
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ENVIRONMENTAL IMPACT OF CHEMICAL REACTIONS (END