My group and I have been brainstorming topics of what to do for our summative that's coming up next month. We have certain topics in mind like the corrosion of metals and buffer systems in shampoo, but our teacher said that they were only "level 3 (out of 4)" ideas and that we need a better topic or expand on the ones I mentioned.
I'm not really asking for a complete answer since we'll be designing the labs ourselves, just maybe an idea about something to investigate.
Some topics we covered were: Chemical bonding and structure, intermolecular forces, thermochemistry, reaction rate, catalysts, equilibrium, acids and bases, buffers, redox reactions/electrochemical cells.