How do you separate iron III oxide and silicon dioxide?

Answer 1

You should be able to use a magnet to attract the iron out of the sand (silicon dioxide)

Answer 2

One common method is to use a magnetic separation technique to separate the iron III oxide, as it is magnetic, while silicon dioxide is not. Another method is to use a technique called flotation, where a chemical reagent is added to selectively float one of the substances while the other sinks. Both methods rely on differences in physical properties to separate the two compounds.