Transcript Chemistry Around Us

Shahad almessairie 201100008
Bashayer alrabiah 201100049
Noura alsulaim 200900099
Budoor alothman 201100179
Dalal aldhubaib 201100178
Dalal althukair 201100164
Chemistry is important because we use
chemicals everyday. It is a part of life. we
breath and drink chemicals to survive.
 The
smell of flowers.
Fragrance is chemistry
 See a Flower.
The colors are chemistry
 The touch of Flower.
The structure of chemistry.
Everything in your home is chemistry.
The wallpaper, shower gel and also cleaning
detergents.
Tetrachloroethylene (PERC) is used as a
common dry-cleaning chemical. Studies have
shown that women exposed to this chemical
have an increased risk for breast cancer.
Short-term exposure may cause skin
irritation, dizziness and headaches.
 Alkylphenols
: are industrial chemicals used
in the production of detergents and other
cleaning products. They're also found in
personal care products, especially hair
products.
 Mercury : Mercury and metals like iron,
nickel, chromium, zinc and lead are found in
some thermometers and paint. A woman with
breast cancer will find mercury in the tumor.
 Cadmium
: Cadmium is another metal, used
in rechargeable batteries and until recently
was widely used in the manufacture of
pigments, metal coatings and plastics. It is
an estrogen-mimicking chemical that has
been linked to early puberty
The exchange of gases (O2 & CO2) in the lungs
happens by simple diffusion: O2 diffusing
from the alveoli into the blood & CO2 from
the blood into the alveoli.
 Soap
is a chemical that mankind has been
making for a very long time.
 You can form a crude soap by mixing ashes
and animal fat.
How can something so nasty actually make you
cleaner? The answer has to do with the way
soap interacts with oil-based grease and
grime
 Soaps
are sodium or potassium fatty acids
salts, produced from the hydrolysis of fats in
a chemical reaction called saponification.
Each soap molecule has a long hydrocarbon
chain, sometimes called its 'tail', with a
carboxylate 'head'. In water, the sodium or
potassium ions float free, leaving a
negatively-charged head.
 Soap
is an excellent cleanser because of its ability
to act as an emulsifying agent. An emulsifier is
capable of dispersing one liquid into another
immiscible liquid. This means that while oil (which
attracts dirt) doesn't naturally mix with water, soap
can suspend oil/dirt in such a way that it can be
removed.
 Grease
and oil are nonpolar and insoluble in water.
When soap and soiling oils are mixed, the nonpolar
hydrocarbon portion of the micelles break up the
nonpolar oil molecules. A different type of micelle
then forms, with nonpolar soiling molecules in the
center. Thus, grease and oil and the 'dirt' attached
to them are caught inside the micelle and can be
rinsed away.
 chemistry
 chemistry
in fuels
plays a role in preparation of fuels
such that there are many isomerism of
alkane ,alkene and alkyne which is also used
for preparation of diesel petrol and black ink
Polymers:
 Polymers are chemical substances consisting
of large number of molecules.
 used
to make our clothes (nylon, cotton )
 Plastics
are polymers
 Chemicals
 The
make our clothes clean
salt that we eat everyday is a chemical
 Glass
is a chemical substance that is used for
a variety of purposes ( windows, bulbs)