You are part of a police unit that has found a powder in a suspect's home. you think it might be a new drug called xyz. xyz is an ionic compound that dissolves in water. however, what you think might be a drug may just be salt. unfortunately there seems to be iron fillings and sand mixed in with the white powder. your job is to isolate the white powder before sending it to the police lab to be tested to determine if it is salt or xyz. give step by step directions on exactly how you will separate your mixture of white powder, iron fillings, and sand.