Funnel Filter

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Frequently Asked Questions...

How to separate a mixture of Iron, salt, carbon, and sand?

I have to separate a mixture of (one from each line):
A: Iron
B: Salt / Cobalt Chloride
C: Carbon / Chalk
D: Sand

We can only use:
water, beakers, watch glasses, small scoops, magnets, funnels, filter paper, test tubes, wash bottles, and hot plates.

The mixture is in a powdery state when I first get it. I have to have all 4 things separate when done.

I know to use water to separate Salt. Then dry it out and use a magnet to get the iron out. But I'm not sure what to do after that. I read some things saying that acid dissolves the carbon, but I can't use acid.

Also I have to have this procedure typed up by tomorrow, so I need the answer in less than 4 hours.
I'll write that up.
I asked a friend who's had that class and he said just write something that sounds smart and I should get the points for it.

Best Answer...


Magnets for the iron

Dump the sand+salt+carbon mixture into water, dissolve all the salt, the carbon will float so pour it off (carefully), strain the sand (which is on the bottom) out, then wait for the saltwater to evaporate and leave the salt.