Read the "changes in physical state," "filtration," and "chromatography" sections of the lab textbook
Complete your prelab worksheet
Prepare your notebook pages according to the pre-lab instructions
Wear your safety glasses, gloves, and lab coat
It is dangerous to inhale silica, so be careful not to let it get into the air. Scoop with a spatula rather than pouring it, and wipe up spills with a damp paper towel rather than brushing it away.