mixing and separating
TRANSCRIPT
MIXING AND SEPARATING
12-6-2013
MIXTURE OR NOT A MIXTURE
ALCOHOL
MIXTURE OR NOT A MIXTURE
GOLD RINGIt depends on the purity of the gold. A 24 karat gold ring is pure gold, therefore it is a pure substance and not a mixture. A karat is the mass of gold divided by the mass of the substance times 24. Anything less then 24 karat is not pure gold, therefore it is a mixture. The remainder is generally silver
MIXTURE OR NOT A MIXTURE
CLEAN AIR
Air is a mixture of elements and compounds
So what is in Air??
COMPOSITION OF AIR
78% Nitrogen 21% Oxygen 1% Other Gases
Fill in page 28 of the SciPad
FILTRATION Filtration the separation of solids from
fluids through a filter which only the fluid can pass.
Fill in page 28 of the SciPad
EXPERIMENT A mixture contains sand, salt and iron filings
We want to separate the sand, salt, and iron filings from one another
Devise an experiment to separate the sand, salt and iron filings from one another
There are known weights of sand,salt and iron filings in each mixtureso at the end the effectiveness ofseparation can be tested
EXPERIMENT In groups, devise a scientific experiment to separate
the substances. The report (which is to be written in your book) should include
Title Date Aim Equipment used Method Results Conclusion
This lesson we are just devising aim, method and equipment used