hi, for my assignment i was asked to write up a practical of how to separate a mixture containing iron powder, silica, benzoic acid and sodium benzoate. i think i know what to do but could you please tell me if this is right:
firstly add cold water to the mixture to dissolve the sodium benzoate then filter the remainder. then heat with a bunsen burner to melt the benzoic acid, then filter. then use an electrode magnet to seperate the iron powder and silica?
i would then need to heat the sodium benzoate back up to restore to a solid and allow the benzoic acid to cool to allow crystals to reform?
is this correct? thanks in advance
This sounds fine. The only minor point is that it would not NEED to be an electromagnet to separate the iron and silica - a normal one would do.