sand & sawdust separation
Posted: 26 Mar 2007, 15:51
A yr 8 fill-in lesson. Easiest way to separate sand & sawdust? Flotation?
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sand & sawdust separation
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Posted: 26 Mar 2007, 16:40
That is what i would do - efficent and fast
Alterntave fill in
Posted: 27 Mar 2007, 07:57
Hello,
Our year 8 fill in activity is seperating a mixture of Iron filings, sand and salt.
They use magnet for iron, add water to dissolve salt and filter sand then evaporate the water to get the salt.
Extention is to collect the water during evaporation (they have to ask me for a distilitation kit.)
Might be a good alternative.
Regards
Michelle
Our year 8 fill in activity is seperating a mixture of Iron filings, sand and salt.
They use magnet for iron, add water to dissolve salt and filter sand then evaporate the water to get the salt.
Extention is to collect the water during evaporation (they have to ask me for a distilitation kit.)
Might be a good alternative.
Regards
Michelle
Posted: 27 Mar 2007, 10:31
We do iron filings (magnetic removal), then students add water, and remove wood chips (floatation), sand (decantation), this may take a few washes with water to decant all the rest off, copper chloride (filtration), copper sulphate (evaporation),
Cheers
Jen
Cheers
Jen
Posted: 28 Mar 2007, 10:49
Great, thanks guys.
The teacher wanted to do the Fe filings/sand/salt prac with the juniors... but I wasnt comfortable with it, as it was the exact prac that our yr chems were doing for assessment the very next day. & I knew that there were some younger siblings in that junior class. So the idea was to pull the plug on their planned prac, & to throw in something different, but similar. Kind of making it up as we go along!!!
The teacher wanted to do the Fe filings/sand/salt prac with the juniors... but I wasnt comfortable with it, as it was the exact prac that our yr chems were doing for assessment the very next day. & I knew that there were some younger siblings in that junior class. So the idea was to pull the plug on their planned prac, & to throw in something different, but similar. Kind of making it up as we go along!!!