You have NaCl NH4Cl. Choose the method to seperate them
I dont know what to do, do I lower the temperature until one of the preipitates out? Or do I add another substance that would form preipitate wth them?
you are right, you manipulate temperature and precipitate wanted compound, and here is why: http://www.saskschools.ca/curr_content/chem30_05/graphics/4_graphics/sol_curve.jpg
other than temperature you can manipulate pressure to get what you want but in this case it doesn't pay off...