Conclusions

Were you able to prepare ferrofluid and observe spiking in the presence of a magnet?

How many spikes were immediately around the central spike and how were they arranged?

Examine the starting FeCl₂ and FeCl₃ solids used to prepare magnetite (leave the solids in the sealed zip-loc bags.) How do they respond to a magnet?

What is the purpose of the surfactant? Explain chemically how the surfactant works to keep the nanoparticles suspended.