C7 (Chemistry) Ideas in context May 2012

This is information that I expect will come up and we will need for the Ideas and Context in Chemistry C7 May 2012. I cannot guarantee that I have included all the information needed, or that the information listed below will be needed, but it will help with your general knowledge anyway. Good luck!

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Stephanie Smith
This is information that I expect will come up and we will need for the Ideas and
Context in Chemistry C7 June 2012. I cannot guarantee that I have included all the
information needed, or that the information listed below will be needed, but it will
help with your general knowledge anyway. Good luck!
Phthalates:
-These disrupt hormone activity
-Some mimic the female hormone oestrogen, which some researchers have shown that
this can mean that boys are born with genital abnormalities
-Some say that certain phthalates can impact the developing of the brain, by preventing
the action of the male hormone testosterone
-Before they can make conclusions about the boys who play less with traditional boy's toys
from the studies, more scientific experts need to look at the study in more detail
-They are colourless and odourless organic chemicals
-Makes the rigid PVC more flexible, durable and versatile
-Plasticisers are used in many different applications
-They allow vehicles to run longer, lighter, more fuel efficiently, and safer
-PVC is dirt and germ resistant
-When flexible PVC has reached the end of its life, it can be recycled to a wider ray of products
-It is therefore very sustainable
-Although phthalates have been banned in products such as baby toys, it can still be used in
furniture and packaging. This is because there is less likely to be the same contact with children
and they will not be consuming it as much as they would with their toys (which can be put into
mouths, especially when very young and going through the teething stage)
Risk:
The level of risk that someone finds acceptable varies from person to person, for example:
-Both Governments and scientists in various situations have to choose levels of risk on
behalf of other people, although their decisions are often influenced by the public
opinion
-When reducing the risk, it can cost a lot, and it is never possible to reduce the risk of
something to zero

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Stephanie Smith
-Because this risk cannot be reduced to zero, the people in charge of this aim to
keep the risks As Low As Reasonably Achievable. This is the ALARA principle
-Many people react to a risk using the Precautionary Principle, which states that:
If you are unsure about the risks of something, but the results of it could be both
serious and irreversible, it makes sense to try and avoid it.…read more

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Stephanie Smith
Meet up with the woman and children on more than one occasion, and monitor how they
grow up, their influences etc
Polymer properties:
The properties of a polymer depend on how the molecules are arranged- it doesn't just
depend on the chemicals that it's made from
o If the polymer chains are packed close together, the material will have a high
density
o If the polymer chains are spread out, the material will have a low density
It also depends on how they're…read more

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