1. The problem statement, all variables and given/known data So there are three fabrics with various stains, and you must figure out what type of bonding/interaction takes place between the stain and the fabric. Cotton: has lipstick, grass, charcoal, and..invisible potassium iodide stain Nylon: lipstick, charcoal, grass PVC (polyvinylchloride) : lipstick, charcoal, (not sure about grass) 2. Relevant equations 3. The attempt at a solution cotton: chlorophyll's positive centre forms dipole bond with negative atom in cellulose/cotton (or does the chlorophyll hydrogen bond with cellulose? not sure) eosin hydrogen bonds with cellulose charcoal = no idea.....carbon bonds with oxygen? dipole bonding? potassium iodide = no idea again... nylon: stains same interaction as on cotton PVC: charcoal = again, not sure. charcoal's giving me problems lipstick = eosin (negatively charged) bonds to the carbon in the polymer chain ((pvc i'm not sure about either, it could have something to do with the plasticizer dibutyl phthalate)).