mixing and separating

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