I need to create a procedure for doing what the title says. I have researched online, but have not found any way (I did find one pre-made procedure, but it cost $38). I am at a loss, given the relative inertness of silica and the fact that it is a colorless solution. Does anyone have any suggestions? Or pointers? Thanks, Nkk Also, I did not consider this a homework question, but if the mods feel it is too homework-ish, then my apologies.