Hihi, my son was checking with me on the possible answer but i am lost. I chose magnetic attraction but it seems no feasible as its a whole compund in a rock. Please help. Thank you.
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mr.tan
Your answer is correct. First 3 methods would require iron ore to be in some liquid form, which is not the case for iron ore.
Your concern is that iron ore is a compound and magnetic attraction may not work. I did some checks and it turns out that iron ore is actually a mixture of several minerals and rock types. The most common types of iron ore are hematite (Fe2O3) and magnetite (Fe3O4), of which hematite is weakly magnetic and magnetite is strongly magnetic. So magnetic attraction is the best option here.
JJCF
Thank you for your precious time in researching n replying. Much appreciated. ☺️
mr.tan
You are welcomed!
Btw I’ve corrected the explanation. Hematite is only weakly magnetic but magnetite is strongly magnetic. (I am assuming Wikipedia is correct; I am not an expert on iron ore minerals!)
JJCF
At least you did a great research on it. Commendably more patient than me. Haha.
Thank you!
sushi88
Magnetic attraction should be correct because
- Separation of solid from solid
- Most iron ores are ferromagnetic, meaning they are attracted to magnets and can become magnets themselves when placed in a magnetic field.
Crystallisation : Liquid or gas –> solid
Evaporation : Liquid –> gas
Filtration : Liquid with impurities goes thru a filter —> pure liquid.
JJCF
Much much appreciated for your explanation. 😊 Thank you. =)